Sick of Sudoku? Cross with crosswords? Try vaki puzzles. Solve a vaki puzzle by completing the grid so that each cell contains a pair of symbols (most commonly a letter and a number, but some puzzles use numbers only), each symbol appears once in each row and once in each column and no pair is repeated (C2 is the same as 2C) This book, the second edition, contains 286 Vaki puzzles (including the original 100) from the very small and fairly easy to the larger 5x5 puzzles which can take an experienced vakian 20-25 minutes to solve. Solve vaki puzzles online at www.vakipuzzles.com