Book excerpt: Tend the zen garden of your mind with three different types of Japanese logic puzzles. This book features three different types of elegant, handcrafted Japanese logic puzzles from Nikoli: masyu, yajilin, and suraromu (also called "slalom")--90 puzzles in all. The choice of puzzle types was inspired by the image of raking a zen garden, as each involves drawing a long, winding path. Like sudoku, the puzzles have simple-to-understand rules, and solvers will be able to ease into the book with plenty of easy- and medium-difficulty puzzles.