Packed with over 450 brain-boosting word search puzzles, sudoku, crossword puzzles, mazes, and more, this collection of unique challenges is designed to keep your mind sharp and thoroughly entertained! Keep your brain fit by searching vertically, diagonally, forwards, and backward in pursuit of hidden words and cracking numbers in sudoku. Help improve memory and focus by completing a new challenge every day! The ultimate book of mixed puzzles is part of the brain-busters puzzle collection.  Over 450 puzzles & solutions: hours of fun and entertainment to enjoy with a large variety of everyone's favorite puzzles. Unique challenges: designed for the novice, intermediate, to expert these mixed puzzles will challenge at every level.