If you were hooked on Sudoku, and have been captivated by Kakuro, this book will help you to take things one step further. It is not only filled with puzzles ranging from the tricky to the diabolical, it also provides a large amount of background information on how you can use logic and maths to solve any question or puzzle, and how you can truly refine your skills at logical deduction and arithmetic. Designed both for the improving puzzle solver and all those who want to learn how to use logic properly, it is filled with worked examples and Sudoku grids, and contains plenty of actual puzzles of all kinds, from Killer and Samurai Sudoku to Kakuro and beyond - a unique combination of essential reference book and fun puzzle compendium.