Gorgeous Puzzle Books for Smart People

Killer Sudoku, Done Right

We've rebuilt Killer Sudoku from the ground up: shaded cages, a new grading system, and a fabulous layout. Discover Properly Killer Sudoku...

A puzzle library in your pocket. Discover the extensive range.

Beat the clock, and your friends. Try Speedoku, a new puzzle every day.

Puzzle Genius is an imprint of Shelfless.