
BSR is a position in a race, not a sales counter — recalculated hourly, decaying without sales, separate for every format and every marketplace. Here is how the rank really works, roughly what different BSR levels mean in daily sales, and the mistakes authors make reading it.

Your first Amazon ad campaign, step by step: which campaign type to start with, how to set bids and budgets that can't hurt you, the two-campaign structure that harvests keywords automatically, and — the part every tutorial skips — how to know if it's actually making money.

Zero sales has exactly two possible causes: nobody sees the book, or people see it and don't buy. Here is a 10-point checklist that tells you which one you have — visibility or conversion — and what fixes each, before you spend a cent on ads.

The 70% royalty option is not automatic and not always the better deal. Here is exactly how KDP's 35% and 70% ebook tiers work, what the delivery fee really costs, how paperback and hardcover royalties are computed, and the pricing traps that quietly cut your royalty in half.

By default, Amazon withholds 30% of your US royalties if you are not a US person — and a five-minute tax interview with the right treaty claim can cut that to 0% for many countries. Here is how KDP withholding actually works, what the W-8BEN does, and the mistakes that quietly cost authors thousands.

KDP Select trades ebook exclusivity for Kindle Unlimited page reads, promo tools and 70% royalties in four extra marketplaces. Whether that trade wins depends on your genre's read-through economics — not on ideology. Here is what Select actually grants, what it actually costs, and the numbers that settle it.

An account-level ACOS hides the losing titles your winners are subsidising. Here is how to calculate net profit per book, the costs authors forget, and a simple framework for deciding what to scale, fix, or pause.

Screenshots of five-figure months tell you nothing about what KDP realistically pays. Here is the honest math: what one book earns at realistic sales volumes, why gross royalty screenshots hide the ad spend behind them, and the three levers that actually move author income.

The KDP dashboard, the Royalties Estimator, the Orders report and the Payments report update at different speeds and measure different things — which is why they never quite agree. Here is what each report actually contains, how fresh each number really is, and the one that finally settles what you earned.

KDP pays royalties roughly 60 days after the end of the month they were earned — per marketplace, per currency, and only above certain thresholds for some payment methods. Here is the full payment timeline, what actually delays a payment, and a checklist for the classic 'why hasn't KDP paid me' panic.