Is a BookBub Featured Deal worth it? At $0.99 a standalone needs 66% of clicks to buy; a 5-book series needs 4.7%. All 44 categories, with real fees.
Best AI for writing fantasy novels: a full KU read of a 120k-word fantasy pays $3.39, 2.4x a novella. Pick a tool that keeps 120k words consistent.
Is Expanded Distribution on KDP worth it? At $14.99 keep $2.12 vs $5.11 on Amazon (~3 ED copies); at $9.99 ED pays $0.12.
How much does it cost to self publish a book on KDP? $0 to Amazon, $1,920–$8,930 for editing and covers, and 557–2,589 sales to break even.
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.
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 is 13–25 sales a day, #100,000 is 1–2. What each rank pays at $4.99, romance shelf thresholds, portfolio math.
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, from $0.004202 in January to a 10-year-high $0.005365 in September, plus what a full KU read pays.
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.
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.
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.