Suguru Challenge

Suguru is a puzzle that has simple rules, but which provides sufficient challenges to satisfy the most enthusiastic solvers Even though the rules are simple, you will need all your skills to solve it. This puzzle (sometimes called Number Blocks or Tectonics) is very addictive and comes in a wide range of sizes and levels of difficulty.This book contains a great collection of Suguru puzzles of different sizes and with six levels of dificulty, ranging from the basic 4x6 to the gigantic 20x20.