Alpha Books is proud to introduce the next huge thing in puzzling. We've even coined the name: Kaidoku (Japanese for "the solver of codes"). Following in the footsteps of both Sudoku and Kakuro, Kaidoku is style of puzzle introduced decades ago in some of the smaller puzzle magazines but had fallen into obscurity. Matt Gaffney, crossword puzzle expert and master puzzler, brings it back to life for the insatiable puzzlers today. A sample puzzle and solution are attached to give an idea of how addictive and challenging this brand-new puzzle is.