Kindle Unlimited All Star Bonus: Stuck at $3.4 Million Since 2024 While the Fund Grew 19%
Kindle Unlimited All Star bonus, explained: $3.4M a month since 2024, just 4.9% of KU pay. Who gets it, when it pays, and what it’s worth in page reads.
Missing the Best Days in the Market: Skip SPY’s 10 Best Days Since 1993 and $313,613 Becomes $136,082 (Python)
Missing the best days in the market, tested: skip SPY’s 10 best days since 1993 and $10k ends at $136,082, not $313,613 (−57%). Charts + Python.
Read-Through Rate: 64% of the Readers a Series Loses Quit Before Book 2
Read-through rate benchmarks: 50–60% paid, ~86% in KU. 64% of lost series readers quit before Book 2, so a Book 1 fix pays 76% of writing Book 6.
Kindle Sales Rank Calculator: #10,000 Means 13–25 Sales a Day, #100,000 About 1–2
Kindle sales rank calculator: #10,000 is 13–25 sales a day, #100,000 is 1–2. What each rank pays at $4.99, romance shelf thresholds, portfolio math.
Amazon Book Description Generator: KDP Says 150 Words, Bestselling Romance Blurbs Average 257
Amazon book description generator tips: KDP says 150 words, but bestselling romance blurbs average 257 and 63% use third person. Data + napkin math.
Dividend Reinvestment Calculator: $10,000 in SPY Became $83,195 With DRIP vs $59,123 Without (Python)
Dividend reinvestment calculator on real data: $10k in SPY became $83,195 with DRIP vs $59,123 as cash since 2000. VYM, SCHD, QQQ, taxes, Python.
Self Publishing Romance Novels on Amazon: Indie Top 100 Share Fell 71% → 44%, and Romance Still Pays Best
Self publishing romance novels on Amazon: indies fell from 71% to 44% of the Kindle romance Top 100 in 2025, yet romance still pays indies best. The data.
KENP Rate 2026: Every Month So Far, and Why September’s $0.005365 Was a 10-Year High
KENP rate 2026: every month so far, from $0.004202 in January to a 10-year-high $0.005365 in September, plus what a full KU read pays.
Permafree Book: 86% of Free Readers Never Buy Book 2, and It Still Pays ($1.49 a Download)
Permafree book math: 86% of free readers never buy Book 2, yet a free download is worth $1.49 on a 5-book series. Plus how to get Amazon to price-match $0.
60/40 Portfolio Max Drawdown: −35.8% in 2008, but Only 3.7 Points of Cushion in 2022 (Python)
60/40 portfolio max drawdown: −35.8% in 2008 vs −55.3% for stocks, but only a 3.7-point cushion in 2022. Daily data since 1986, tables, Python.
KDP Paperback Royalty Calculator: One Cent Pays 3.6× More, and Every 100 Pages Costs $1.20
KDP paperback royalty calculator: 60% at $9.99+, 50% below, minus $1 + $0.012/page. A 300-page book pays $0.39 at $9.98, $1.39 at $9.99.
Best AI for Editing a Novel: Hand AI the $1,740 Pass, Keep the $960 Human Proofread
Best AI for editing a novel, by the numbers: AI takes the $1,740 structural pass, a human proofreads, and a 60k romance edit drops from $4,020 to $1,000.
KDP Passive Income Isn’t Passive: $10K-a-Month Authors Spend $4,500 a Month on Marketing
KDP passive income is real but not hands-off: $10k/month authors spend $4,500/month on marketing, and a stalled catalog halves every 18 months. The math.
How Long Does It Take the Stock Market to Recover From a Crash? Median 2.1 Years (Python)
How long does it take the stock market to recover from a crash? S&P 500 median: 2.1 years across 12 crashes since 1928. Depth table, dividends, Python.
Kindle Countdown vs Free Book Promotion: A Free Reader Is Worth 83% Less, and Free Still Wins 4.6× on a Series
Kindle Countdown vs free book promotion: a free reader is worth 83% less, yet free earns 4.6× more on a 5-book series. KDP rules, math, 2.2% break-even.
KDP Audiobook Royalty: 40% With Virtual Voice, and the 1,722-Sale Math vs a Paid Narrator
KDP audiobook royalty: Virtual Voice pays 40% ($6 per $14.99 sale) for $0. A $2,581 ACX narrator needs 1,722 sales to win. Rates, math, Kindle+ catch.
KDP Box Set: One $12.99 Sale Now Out-Earns the Average Reader’s 5-Book Run
KDP box set math: since July 2026 a $12.99 box keeps 70% ($8.57 a sale), beating a reader’s 5-book run. Pricing, KU 3,000-page cap, setup checklist.
Sharpe Ratio vs Sortino Ratio: A Sharpe Tie Became 2.08 vs 1.65 (Python)
Sharpe ratio vs Sortino ratio in Python: Bitcoin and QQQ tied on Sharpe (0.98 vs 0.97) over 10 years, but Sortino scored them 2.08 vs 1.65. Here’s why.
How to Write a Romance Book Series When Book 1 Earns Only 32% of the Money
How to write a romance book series: Book 1 earns only 32% of a 5-book series’ reads. Plan 5 books, fix the Book 1 to 2 leak, and keep the trope promise.
KDP Keywords Examples: 7 Filled Boxes for a Romantasy Series (Plus the $4.41 Reader Math)
KDP keywords examples: 7 filled boxes (50 characters each) for a romantasy series, KDP’s avoid list, a series keyword map, and why a reader is worth $4.41.
Best AI for KDP: The Draft Is Only 0.6% of Your Book Budget (Pick the AI That Saves Edits)
Best AI for KDP? The draft is only 0.6% of a $4,770 pro-edited romance. Pick the AI that saves editing passes, with a Python budget calculator.
How Often to Rebalance Portfolio? Once a Year (39 Trades Matched 477 in 40 Years)
How often to rebalance portfolio? Once a year: in a 40-year 60/40 Python backtest, 39 trades matched monthly’s 477 on Sharpe with a smaller drawdown.
KDP Select vs Wide: 60 Wide Readers Replace 100 Kindle+ Readers (Long Books Should Stay)
KDP Select vs wide: 60 wide readers replace 100 Kindle+ readers for a 300-page $3.99 book, but long books win in Select. Python calculator inside.
Are KDP Ads Worth It? A Standalone Breaks Even at $0.27 a Click, a 5-Book Series at $0.83
Are KDP ads worth it? A $3.99 standalone breaks even at $0.27 a click, a 5-book series at $0.83, vs $0.70-0.90 fiction CPCs. Python calculator inside.
KDP Launch Strategy: Book 1 Is Only 32% of the Money
KDP launch strategy for series authors: Book 1 is only 32% of a reader’s value. Pre-order rules, bank-or-publish math and a Python script for KU income.
How Much Can You Make on Kindle Unlimited? $1.43 per 300-Page Read, 699 Reads for $1,000
How much can you make on Kindle Unlimited? About $1.43 per full 300-page read in 2026, so $1,000/month needs ~699 reads. Series math + Python script.
Lump Sum vs DCA S&P 500: A 3-Month DCA Lost Money More Often Than Investing at Once
Lump sum vs DCA S&P 500 since 1988: lump sum won 65-78% of 453 start months, and DCA barely changed the odds of a losing year. Python script included.
KDP AI Book Cover Math: 25 Designer Covers Cost $20,000, a Hybrid $4,000
KDP AI book cover rules and math: disclose AI images, use 1600×2560. 25 designer romance covers cost $20,000; a hybrid $4,000. Python payback calculator.
Multiple Pen Names on KDP: 3 Names Turn a 25-Month Path to 25 Books Into 75 Months
Multiple pen names on KDP? KDP allows them, but at 1 book a month 3 names need 75 months to reach 25 books each. When splitting pays, with Python math.
Compare My Portfolio to the S&P 500: Why a 3.7-Point Loss Can Look Like a Win (Python)
How to compare my portfolio to the S&P 500 the right way: a Python shadow benchmark on 5 years of real data turns a fake +1.5-point win into a 3.7-point loss.
Best AI for Writing a Book Series: Book 5 Needs 213,000 Tokens of Memory
The best AI for writing a book series needs memory: by Book 5, Books 1-4 are 213,000 tokens. Why a story bible beats a bigger window, with Python math.
How Often Can You Publish on KDP? 3 a Day Max, but Monthly Hits 25 Books in 25 Months
How often can you publish on KDP? Up to 3 new titles a day, but 25+ books matters more: one a month gets you there in 25 months. Python math inside.
How to Price KDP Ebook Series: $3.99 Wins Alone, a $0.99 Book 1 Earns 2.1× on 5 Books
How to price KDP ebook series: $3.99 earns most for a standalone, a $0.99 Book 1 earns 2.1x across 5 books, and paid ads favor $3.99. Python model inside.
How to Get More Kindle Unlimited Page Reads: 4 Levers Stack to +74% on One Series
How to get more Kindle Unlimited page reads: fix Book 1 to 2 read-through, add Book 6, write full-length books, then buy readers. Stacked: +74% page reads.
How Many KDP Books to Make Money? At 25+ Books, the Median Is $3,000/Month
How many KDP books to make money? Survey data says about 25: authors with 25+ books earn a median $3,000/month. Napkin math, a Python calculator and charts.
Best AI for Writing Romance Novels: A 5-Book KU Series Pays Back at 33 Readers
Best AI for writing romance novels? Pick the one that remembers Book One. 2026 KU math: a 5-book series pays back its drafting cost at 33 readers.
How Many Poems Should Be in a Chapbook? 20 to 30 (25-30 Pages Fits 11 of 13 Contests)
How many poems should be in a chapbook? I checked 13 contest rules: 25-30 pages of poems fits 11 of them. That’s 20 to 30 poems, depending on poem length.
How to Create a Cookbook for Fundraising: 150 Recipes, 200 Copies, Break Even at Copy 55
How to create a cookbook for fundraising: 50 cooks x 3 recipes, 200 copies for $650 at Morris Press, $12 each. Copy 55 pays the printer; a sell-out nets $1,750.
How Many Words per Chapter in a Cozy Mystery? 2,200 (I Counted 283 Agatha Christie Chapters)
How many words per chapter in a cozy mystery? About 2,200: Christie’s 283 chapters have a median of 2,208. Plan 28-32 chapters for a 60-70k cozy.
How Long Should a Daily Devotional Be? 150 to 300 Words (Spurgeon Averaged 341)
How long should a daily devotional be? Editors want 150-300 words; Spurgeon averaged 341. Past 233 words, a 365-day book doubles to 730 pages.
How to Write My Life Story for My Grandchildren: 385 Words a Week, $34 to Print 5 Hardcovers
How to write my life story for my grandchildren: aim for 20,000 words, talk instead of type, and print five KDP hardcovers for $34. Python math inside.
Can a DM Sell an AI-Drafted D&D Adventure? DMs Guild Says No; itch.io Nets $6.62 on a $7.95 Copy
DMs Guild and DriveThruRPG reject text from AI language generators. A short Python model shows what a game master keeps per copy elsewhere: $6.62 on itch.io, $5.46 on Kindle, $3.98 on DMsGuild at $7.95.
What a 50,000-Word AI Novel Draft Costs on the OpenAI and Claude APIs: $0.04 to $17
A small Python cost model prices a 50,000-word first draft on seven OpenAI and Claude models: from $0.04 to $16.71. About 73% of a naive bill is resending earlier chapters, and prompt caching removes most of it.
Build a KDP Royalty Calculator in Python: One Cent Past $12.99 Costs You 49%
KDP’s royalty rules fit in about 30 lines of Python. Run them and three pricing cliffs appear: $12.99 vs $13.00 on ebooks, $9.98 vs $9.99 on paperbacks, and file size at $2.99.
Top 10 Best AI Dark Romance Book Writers to Try in 2026
Dark romance has taken over BookTok lately. Writers are scrambling to keep up with the demand. I’ve spent a lot of time testing AI tools to see which ones can actually handle the genre without turning everything into a generic love story. The best AI dark romance writers can hold onto morally complex characters, slow-burn
Is creating a book still worth it in 2026?
What are some of the benefits of writing your own book? Let’s recap the basics, starting with more non-fiction oriented benefits and moving into higher-level fiction writing benefits later in this article. Benefit 1: Career Prospects 🚀 and Authority Not everybody respects book authors. Yet – most do: “Publishing a book is still a powerful authority signal: one survey found
What to Code (Book): How Indie Hackers Find Million-Dollar Micro-SaaS Ideas in the Vibe Coding Era
Most builders still think the hard part is coding. That used to be true. It isn’t anymore. Today, with AI tools, templates, and vibe coding workflows, a single person can build in days what used to take a small team weeks. That sounds like good news, and it is. But it changes the game. When
6 Best AI Book Writers (2026): Tools for Authors & Self-Publishers
Want to write a book faster? You probably want to stay organized and keep your ideas clear, too. AI book writers now play a real role for authors in 2026. These tools have improved, and you’ve got more options than ever. This guide lists the 6 best AI book writer tools in 2026 so you
What Your Last 10 YouTube Videos Say About Your Future Business
If we want to VIBE CODE a thriving (side) business, we all know we ought to ‘create value’. For starters, we can easily create value at the intersection of Finding the intersection seems hard but is often trivial from the outside. A serious cognitive bias prevents us from seeing the obvious. But the good news
[Free eBook] Automate the Boring Stuff and Make Money with Clawdbot
👉 Important: See the disclaimers at the end of this page. This is a rapidly changing field and information may be wrong or outdated on this page/book. ⭐⭐⭐ VERY IMPORTANT: Be on the right side of change by joining 130k AI enthusiasts our free AI email newsletter. Introduction: The Rise of AI Agents Artificial intelligence
The JSON Trick – How to Scrape All Answers in a Subreddit? (Example Find User Needs)
Step 1: Open a subreddit with lots of comments and answers relevant to your niche. Step 2: Append “.json” to the URL Step 3: Copy and paste the whole JSON data into ChatGPT/Gemini/Claude Step 4: Prompt something like this to discover user needs: Here’s a sample output on my ChatGPT 5.2 Thinking: It also shows
The Ghost Founder: 10 AI Startups That Can Hit $1B Without a Single Employee
We’ve stripped away the overhead of traditional development to focus on pure execution through vibe coding — leveraging AI to bridge the gap between a billion-dollar idea and a live, agentic product. By joining, you aren’t just getting an accountability partner; you’re entering a 30-day “Ship or Die” cycle where we transform from prompt engineers
Stop Testing LLMs with Poetry: Use Blackjack Instead
🙏 Image and research source: Thomas Taylor (GitHub) If you want to see what an LLM is really good at (and where it still slips), don’t ask it to write a poem or generate code. Ask it to make the same small decision again and again under clear rules. That is why blackjack basic strategy
The “One Niche, One Channel” rule for making your first $1k in AI
Look, if you’re a data or AI nerd, your biggest enemy isn’t the competition. It’s the fact that your brain has way too many tabs open at once. You’re probably sitting there thinking about building some massive ML model or a deep diagnostic tool, and meanwhile, you end up stuck in “builder mode” forever. Nothing
Dreaming of the Mediterranean: When Will Tesla FSD Hit Europe?
Imagine this: You’re in your Tesla, going from your home to the sunny beaches by the Mediterranean Sea. You feel sleepy, so you take a nap. The car drives all by itself – through big highways, twisty mountain roads, and busy towns. It stops at lights, changes lanes, and parks when you get there. Wow!
DriftIDE – A Startup Idea for 1B Vibe Coders [Pitch Deck]
✨ I published this post in my AI newsletter (130k subs). You can join for free here. I just discovered this AI startup idea from Reddit. Will it be the next unicorn after Cursor ($30B valuation)? Note that ideas are cheap, execution is king. To the best of my knowledge, this idea hasn’t been implemented
Do You Choose $1,000,000 Now or $6,000/Month for Life?
I just read this post on X: Post: “If someone offered you $1 million of cash or $6,000/mo for life? Take the $6,000/mo for life every time. Absolute no brainer.” I was stunned that most people didn’t seem to understand that this is not the best option. So, which option is better: To answer this
My Vibe Coding Tech Stack for 2026
As we gear up for 2026, I’m streamlining my coding workflow with a lean, vibe-aligned stack that focuses on simplicity and scalability (I have many projects!). It’s perfect for solo devs or small teams building dynamic web apps. This stack might not be perfect if you work in a large corporation or something. You might
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Merge Two CSV Files Online (Free Tool)
Easily combine two CSV files into one without any downloads or complex software — just upload and merge in your browser. Perfect for quickly appending data from multiple spreadsheets. How It Works: Upload your primary CSV (the one with the header row you’ll keep) as the first file. Then select the second CSV to append