For adults and children. Positive energy for the brain. 2 puzzles per page. 60 Killer sudoku puzzles X diagonal 8x8 medium levels. 60 Killer sudoku puzzles X diagonal 9x9 medium levels. 60 Numbricks puzzles 9x9 medium levels. 60 Numbricks puzzles 10x10 medium levels. Unique puzzles. Only 1 verified solution. All answers are at the end of the book. Killer sudoku may be called or searched with the following phrases or names: sudoku mania, fiendish sudoku, daily killer sudoku main past puzzles, times puzzles killer, sudoku uk, dkm sudoku, usa today sudoku, play sudoku game, the daily sudoku, sudoku billions, sudoku x wing, lovatts sudoku, sudoku k, sudoku name, how to solve sumoku puzzles, guardian sudoku, guardian killer sudoku, telegraph killer sudoku, sudoku cage, sudoku sudoku, times ultimate killer sudoku, killer sudoku solutions, telegraph sudoku, daily sudoku puzzle, the sudoku killer, zero killer sudoku, sudoku quest, extreme killer sudoku, sum doku, simple sudoku puzzle, krazydad killer sudoku, sudoku puzzle game, sudukus, killer su, play soduko, killer sudoku tips, super sudoku puzzles, sudoku game rules, sudoku ki, extreme sudoku puzzles, sudoku game books. Numbricks puzzle may be called or searched with the following phrases or names: numbricks, numbrick, numbrick puzzle, numbrick game, numbrick logic, numbrick sudoku, numbricks puzzle, numbricks game, numbricks logic, numbricks sudoku, numrich, numrich parts, brain teasers for adult, brain games for adults, hard puzzles to solve, numrich stock, daily logic puzzle, brain puzzles, numerical, brain teaser puzzles for adults, mind puzzles for adults, brain puzzles for adults, hard to solve puzzles, numerichs, puzzles hard to solve, numerch. I hope you enjoy the book. Best regards, Basford Holmes