Much more than just a puzzle book -- a comprehensive collection featuring every major variant of sudoku ever created . Over 25 major sudoku types . . . nearly 150 different variants . . . and almost 500 puzzles, all created especially for this book, including Jigsaw Sudoku, Killer Sudoku and multi-grid Samurai Sudoku. No other collection of Sudoku comes close. This is without doubt the most definitive volume of Sudoku variants ever compiled, with full instructions and solutions included. Praise for The Mammoth Book of Fun Brain Training by the same author: "The puzzles are fresh and lively" -- Will Shortz