The Colossal Killer Sudoku Book

This is the book for lovers of Killer Sudoku: 200 puzzles, no easy puzzles, and TEN supersized 16x16 puzzles.

The book has 50 Medium, 50 Tricky, 75 Difficult, 15 Very Difficult, and 10 16x16 puzzles.

The 16x16 are also printed enlarged on 4 separate pages, so you can cut & glue to create a larger version.

Submit your solutions to the difficult puzzles at www.calcudoku.org and score points for correct solutions.

All solutions are included in the back.

This book will keep you busy for countless hours!

Patrick Min is a freelance scientific programmer. He specializes in 3D graphics software, but has worked in many other areas, such as search engine technology, acoustic modelling, and information security. He has published papers and open source software in several. He holds a Master’s degree in Computer Science from Leiden University, the Netherlands, and a Ph.D. in Computer Science from Princeton University. He is also a puzzle enthusiast, devising math puzzles for his father since the age of 7. This continues to this date, with dad solving his son’s Calcudoku and Killer Sudoku puzzles.