Little Book of Bathroom Sudoku

Sudoku is a number placement puzzle, the aim of which is to enter a number from 1 through 9 in each cell of a grid, most frequently a 9X9 grid made up of 3X3 subgrids, starting with randomly placed numbers given in some cells. This book offers 160 puzzles for the sudoku addict and newcomer alike, in a range of difficulty levels.