Just when sudoku fans are getting a bit jaded, along comes an irresistible new challenge--Tridoku! This time, instead of a square, the diagram is a colorfully p

Everyone knows sudoku is enjoyable--but these addictive puzzles come in endless variations too! They range from simple to very difficult, and can take almost no

Offers sudoku in a new shape. Instead of squares, this work offers these puzzles in triangles, all colour-coded to indicate special spaces where numbers can't r

When you buy this book you get an electronic version (PDF file) of the interior of this book. Huge Hashi bundles the biggest and baddest Hashi puzzles ever. You

When you buy this book you get an electronic version (PDF file) of the interior of this book. Futoshiki is a fun and addicting logic puzzle game that combines S