Easy-to-Hard Mensa® Sudoku

Easy-to-Hard Mensa® Sudoku by Longo, Frank. paperback edition. ISBN: 9781402746512.

A super-sequel to Mensa® Sudoku—which will easily equal the popularity of the first, 145,000 copies sold and climbing! Written by Frank Longo, one of the best sudoku creators around, it offers 534 fantastic puzzles (all in the standard 9x9 format) that go from very simple to extremely hard. That means smart newcomers can get started solving immediately and hone their skills as they proceed logically through the book. By the end, they’ll have become experts, ready for any sudoku that comes their way.