Puzzle books and collections from Hapraker Press.
Physical Books
Available now on Amazon. Swipe to browse.
Calcudoku Vol. 1
150 verified puzzles, one solution each. Just like Sudoku, but with the added challenge of real arithmetic.
Kakuro Vol. 1
150 verified cross-sum puzzles, one solution each. No letters, no words — every clue is a sum you work out yourself.
Sudoku Vol. 1
400 verified puzzles across four difficulty levels, one solution each. The classic grid, checked digit by digit to have exactly one valid solution.
Futoshiki Vol. 1
150 verified puzzles, one solution each. Fill the grid so every inequality sign between cells holds true — no calculator needed, just logic.
Digital Puzzle Packs
Downloadable puzzle packs — available now on Gumroad and Payhip.
The Core Four Sampler
20 puzzles, 4 types, verified unique. Sudoku, Kakuro, Calcudoku, and Futoshiki in one downloadable pack. $3.99 (or more, if you want to support a hungry artist).
Our digital puzzle packs are here. Browse the full catalog on Gumroad, or grab select packs — including free ones — on Payhip.