Blog
KDP publishing tips, tool updates, and rate-change alerts.
Why KDP Rejected Your Cover
KDP rejected your cover. Diagnose wrap size, spine text, barcode, safe area, stale page count, DPI, fonts, and PDF/X — each one is catchable before you upload.
KDP Cover Templates: Blank Guides vs Designs
KDP cover templates are two files: a blank wrap with trim and spine lines, or a designed genre layout. Get yours, then judge it on four print-ready tests.
Book Cover Mockup Generator: Get the Spine Right
A mockup with the wrong spine is a lie about your book. How a book cover mockup generator should derive thickness — and which PNG size is actually enough.
AI Book Cover Generator: Four Tests for KDP
Don't trust an AI book cover generator that exports a flattened JPEG. Demand wrap-sized live text, undo, and a print preflight before you lock the book.
What to Put on a Copyright Page
The © line does not create your copyright, and it is not required. What it actually does, what registration adds, and which lines a self-published book needs.
What KDP Checks in an Interior PDF — and What It Can't
Nine things worth checking in a KDP interior PDF before upload, each with the KDP page it comes from — plus the two checks no browser tool can make.
KDP's Free ISBN vs Buying Your Own
A free KDP ISBN cannot publish anywhere but KDP, and lists you as 'Independently published'. When that is fine, when it is a trap, and what you cannot undo.
How to Choose a KDP Trim Size
Only 5 of KDP's 16 trim sizes print on the cheaper cost table, and 6 x 9 is the last one. How to choose before you lay out — and what it costs if you don't.
How Much to Bid on Amazon Ads for a Book
Your break-even ACOS is not your royalty rate, and your bid ceiling is not your royalty. Two formulas that decide whether a book can be advertised at all.
What a Book Readability Score Actually Measures
Every readability formula measures two things: sentence length and word length. What that means for a manuscript, and the comparison that is genuinely useful.
Puzzle Book Maker Software for KDP (2026)
109 puzzle generators, a live Canva-style editor, and real AI tools inside one KDP puzzle book maker — what Book Studio actually includes, puzzle by puzzle.
Why KDP Rejected Your Book Listing
Diagnose a blocked KDP listing in order: read the notice, fix metadata mismatch, strip banned claims, clean description HTML, then cover and interior.
What Counts as a Good BSR on Amazon?
A “good” Amazon BSR only makes sense against a goal—niche validation, ad payback, or category density—not a universal magic rank number.
Choosing a Trim Size and Page Count for a Puzzle Book
How grid size, font, and margins compound into KDP page count, spine width, and printing cost—before you lock a puzzle book cover.
Publishing Under Multiple Pen Names on KDP
One KDP account can carry many pen names—how author fields lock after publish, Author Central claims, and ops for a second byline.
Low-Content Books on KDP: What Still Works
What Amazon KDP means by low-content books, the ISBN and distribution limits that differ, and a differentiation framework—without invented saturation stats.
KENP and Kindle Unlimited Royalties, Explained
How KDP Select pays KU page reads via KENP and the monthly Global Fund—mechanism only, no stale per-page rate. Pair with sale royalties on the same ebook.
KDP Title and Subtitle Rules
KDP title and subtitle rules: match the cover, stay under 200 characters combined, avoid banned promo stuffing, and keep series name separate from volume.
A KDP Listing Optimization Checklist
Optimize your Amazon KDP listing in dependency order: title, subtitle, series, description, categories, seven keywords, then preflight.
KDP Keyword Mistakes That Cost You Visibility
The keyword mistakes that waste Amazon KDP’s seven boxes—or violate policy: competitor names, quality claims, and category stuffing.
KDP Hardcover vs Paperback: Which to Publish
Compare KDP hardcover and paperback on print cost formula, royalty shape, trim limits, spine, and distribution—then run live numbers in the free calculators.
Is KDP Expanded Distribution Worth It?
Expanded Distribution pays 40% of list minus print cost—lower margin for non-Amazon reach. Use a breakeven frame, not hope, before you enroll.
Which HTML Tags KDP Actually Supports
The 12 HTML tags KDP accepts in a book description, the 4,000-character limit (tags count), what paste strips, and how to test in Source before publish.
KDP Cover File Requirements: PDF, DPI, Bleed, Fonts
What KDP expects in a print cover PDF: single full wrap, 0.125" bleed, 300 DPI, embedded fonts, flattened layers—and how PDF/X-1a fits the print gate.
KDP Content Guidelines: A Pre-Publish Checklist
A field-by-field KDP content and metadata checklist—promo claims, competitor names, description bans, keywords, cover match—before you hit publish.
The 7 KDP Backend Keyword Boxes, Explained
What Amazon KDP’s seven keyword fields are for, the per-box length budget (bytes vs characters), why repeating your title wastes a slot, and what KDP prohibits.
How to Write a Book Description for KDP
Write a KDP book description that earns the click: hook → promise → proof → soft CTA, above-the-fold first lines, and claim families Amazon will not accept.
How to Title a Book for Amazon KDP
How to title a KDP book: title carries the promise, subtitle carries search language, both must match the cover—and major changes after publish are hard.
How to Research a KDP Niche on Amazon
A durable KDP niche research order: seed demand, category depth, BSR spread, price band, formats, and gaps—without fake profitability scores.
Publishing to All 12 Amazon Marketplaces
What changes when you price KDP books across 12 Amazon stores: currencies, print cost groups, VAT display, and what a translation does not fix.
How to Publish a Puzzle Book on Amazon KDP
Publish a puzzle book on Amazon KDP: trim and page-count decisions that lock the cover, interior PDF rules, answer keys, categories, keywords, and pricing.
How to Make a Word Search Book for KDP
The full KDP word search pipeline: theme, word lists, grid size, answer keys, interior PDF, and cover — plus the constraints that bite.
How to Make a Sudoku Book for KDP
Build a KDP sudoku paperback: difficulty bands, one-puzzle-per-page layout, answer keys, unique puzzles at scale, then cover and price.
How to Make a Maze Book for KDP
Produce a KDP maze paperback: age bands, difficulty progression, line weight that survives print, answer paths, then cover sized to final page count.
How to Get Book Reviews on Amazon (Within the Rules)
What Amazon allows vs forbids for book reviews, how free copies stay compliant, and a back-matter QR ask that never pays for stars.
How the Amazon Bestseller Badge Actually Works
The Amazon Best Seller badge is a category #1 moment at a rank refresh—not a store-wide guarantee. Categories, velocity, and what you cannot claim.
How to Find KDP Keywords Without a Paid Tool
A free KDP keyword method: seed, expand with Amazon suggestions, cluster, dedupe against your title, and fill seven backend boxes within the byte budget.
How to Design a KDP Book Cover Yourself
Design a KDP cover in the right order: lock page count and trim, size the full wrap, then art—plus wrap anatomy, hierarchy, and export gates.
How to Check If a Book Title Is Already Taken
Amazon title collision and trademark screening are different checks. Use both before you lock a KDP cover—and never treat a knockout search as legal clearance.
How to Analyze a Competitor's Book Listing
A repeatable read of Amazon book competitors: cover, title language, description themes, categories, BSR, formats—without inventing backend keywords.
How Amazon Search Suggestions Work
Amazon search suggestions are a demand signal, not a secret volume number. How autocomplete works, and why honest tools refuse fake volumes.
Can You Trademark a Book Title?
Single book titles generally cannot register as US trademarks; series titles can. The USPTO rule, and what to do before locking a name.
Are AI-Generated Books Allowed on KDP?
KDP allows AI-generated text, images, and translations—with required disclosure. AI-assisted work is different. Here’s the durable split.
KDP 50% vs 60% Royalty: When to Raise Price
KDP print books earn 50% or 60% by list price. See marketplace thresholds, why the drop hits harder than 10%, and when raising price is worth it.
How to Price a Book on Amazon KDP
Set a KDP list price from breakeven floor, 50/60 rate step, and competitor pins — not a guess. Free pricing curve, formulas, and marketplace floors.
How to Estimate Amazon Book Sales from BSR
Turn Amazon Best Sellers Rank into useful sales estimates—without fake precision. Overall vs category rank, power-law curves, and a free ranged calculator.
How to Choose KDP Categories
Pick Amazon book categories that fit your content—not empty bestseller badges. Three slots, accuracy rules, BSR checks, and a free category path finder.
How to Choose a Pen Name for KDP
Pick a KDP pen name you can keep: genre fit, Amazon Books collision checks, domain handles, and the author-field rule you cannot reverse after publish.
How to Check Keyword Density for KDP
Use keyword density as a diagnostic—not a magic %—to audit your KDP description and fill the 7 backend keyword fields without stuffing or policy violations.
How to Calculate KDP Cover Size and Spine Width
KDP cover size is spine width plus two trims plus bleed. Learn the paperback formulas, the 79-page spine-text rule, and when hardcover needs a different plan.
How to Add a QR Code to a KDP Book
Put a print-ready QR code on your KDP cover or back matter without colliding with the ISBN barcode—size, quiet zone, error correction, and review-link timing.
How KDP Printing Costs and Royalties Work (2026)
Learn how Amazon KDP calculates printing cost, royalty rate, and minimum list price — with formulas, ebook 35% vs 70%, and a free all-marketplace calculator.