Sudoku Variations (Volume 2)

Volume 2, with even more Sudoku variants than the first one!
75 Sudoku Variations, two of each kind, making 150 puzzles, plus a very special gift at the end.
Where should I start?
First, there are some novelties which were not there in the previous volume, namely:

• Multi Sudoku, also known as Loco Sudoku, something really CRAZY
• and Frame Sudoku, which is something between Killer Sudoku and Outside Sudoku

Then, there are 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 +*-/

Finally, 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 surprise final puzzle this time? It's for you to find out!