Feature●Ready for a challenge? Check out these fun and entertaining puzzles!●In these pages youll experience a sampling of Sudoku, past and present. Among the hundreds of puzzles are "original" sudokus, Sudoku Extremes, Jigsaw Sudokus, KenKen, and Sum-Doku. As a bonus, youll also find cutting edge variations. These include Tight Fit, Even/Odd, Consecutive, Arrow, Thermo and Isodoku. If youre not familiar with these, youre in for a treat! With clear instructions and a range of difficulty levels, we believe theres something for everyone in this compilation.●Each measures 7 1/2 x 10 3/4". 146 pages each.●Volumes 11, 12, and 13●Please see all pictures for samples of puzzles you will find inside.Description In these pages youll experience a sampling of Sudoku, past and present. Among the hundreds of puzzles are "original" sudokus, Sudoku Extremes, Jigsaw Sudokus, KenKen, and Sum-Doku. As a bonus, youll also find cutting edge variations. These include Tight Fit, Even/Odd, Consecutive, Arrow, Thermo and Isodoku. If youre not familiar with these, youre in for a treat! With clear instructions and a range of difficulty levels, we believe theres something for everyone in this compilation.