About

We make the books we wanted to buy.

Hardcore Puzzler started with a simple complaint: too many puzzle books labelled "hard" are finished in an afternoon. So we make books with plenty of puzzles, clear printing, and difficulty that climbs properly from novice to genuinely tough.

Browse the books
A reader relaxing in an armchair with a Hardcore Puzzler 2000 Sudoku book

How we grade difficulty

Most series come in three levels. Within each book the puzzles get harder as you go, so there is always a next step.

Cover of 600 Easy to Hard Calcudoku Puzzles for Adults

Novice

Easy to Hard

Cover of 600 Medium to Very Hard Calcudoku Puzzles for Adults

Adept

Medium to Very Hard

Cover of 600 Hard to Extreme Calcudoku Puzzles for Adults

Master

Hard to Extreme

What's in the range

Many come in large print with one puzzle per page, and in a pocket size for travelling.

Get in touch

Found an error in a puzzle, or have an idea for a book?

Contact us