Book excerpt: Clear your mind with sudoku! Many solvers love sudoku not just for the intellectual challenge or the sheer fun of solving, but because sudoku puzzles help them attain an almost Zen-like state of mental relaxation. Sudoku, to put it simply, help solvers get in the zone. Features: · 100 all-new puzzles · Edited by legendary New York Times crossword editor Will Shortz · Big grids with lots of space for easy solving