Numbrix Puzzle BookIf you enjoy Math Logic Puzzles like Sudoku or Kakuro then you will love Numbrix. The goal is to fill the grid with a series of consecutive numbers from 1 to 100. Consecutive numbers must be placed adjacent to each other either vertically or horizontally (but not diagonally).This Numbrix Puzzle Book is a fun way for teens or adults to sharpen their minds and test their logic. Including 420 Puzzles of varying difficulty to keep you entertained for hours. Book Features:Loads of Puzzles: 132 Easy, 144 Medium and 144 HardSuitable for all Levels: Beginner to ExpertPerfectly Sized - 7" x 10"Premium Matte Color cover designPuzzle King Publishing: Puzzle Books for Everyone!