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The all-in-one toolkit for Amazon KDP publishers.

Edit anything after it's generated — every puzzle stays a live, editable object.
Every puzzle verified unique — with a certificate to prove it.
Print-ready means print-ready — KDP preflight built in, before export.

What's inside28 free tools, no login →

Book Sales & Royalty EstimatorChrome extension

Overlays BSR, royalty, and trim data on any Amazon book page.

BSR · Royalty · Trimon every listing

Keyword Suggestion ExpanderFree tool

One seed keyword becomes a tree of real Amazon suggestions.

sudoku book+ for adults+ large print+ hard

KDP Royalty CalculatorFree tool

Printing cost, royalty, and minimum list price — all 12 marketplaces.

$12.99 list − $2.44 print$5.35 royalty