9A book with more Sudoku variants than any other
75 Sudoku Variations, two of each kind, making 150 puzzles, plus a very special gift at the end.
Where should we start?
First, there all sorts of Sudoku variants you can think of:

• classic Sudoku in various sizes: 6x6, 8x8, 10x10, 12x12 and 16x16
• Jigsaw Sudoku and Jigsaw Combination
• Diagonal Sudoku X
• Consecutive Sudoku
• Non-Consecutive Sudoku
• Hyper Sudoku (Windoku)
• Greater/Less Than Sudoku (inequality sudoku)
• Odd-Even Sudoku
• Sudoku Straights
• TriDoku
• OUTSIDE Sudoku of all sorts
• Killer Sudoku and Killer with all operators +*-/

Then, the overlapping Sudoku varieties in this book are:

• Double Sudoku
• Triple Sudoku
• Flower Sudoku
• TwoDoku
• Butterfly Sudoku
• Sudoku Ring

But wait... that's not all There are numerous combinations of these variants and overlapping Sudokus.
What is the final puzzle? It's for you to find out