Take a break with our Sudoku Mini Anthology - Volume 4. Enjoy a collection of colorful and brain-teasing Sudoku puzzles with solutions. Its convenient travel size turns any moment into a mini mental getaway. Keep your brain sharp by solving puzzles while waiting in line, sipping your morning coffee, or during your commute. Already an expert? Volume 4 is full of difficult level Sudoku puzzles that test your solving abilities. 100 PUZZLES & SOLUTIONS: Enjoy a clear layout of 100 Sudoku puzzles and solutions. CHALLENGING PUZZLES: Made for those wanting a more difficult level of Sudoku puzzles. MINI TRAVEL SIZE: Easily fits in your bag, purse, or pocket. Fun addition to your planner stack. PERFECT GIFT FOR SUDOKU LOVERS: Treat yourself or a fellow Sudoku lover to a fun mini version of your favorite puzzle game. Perfect as an add-on gift or stocking stuffer.