I personally get most my Sudokus online instead of books as I like variants more and there's more variety there. I have a few books that have satisfy my enjoyment of variants.
The Mammoth Book Of New Sudoku by Gareth Moore If you want a lot of puzzles, this will probably suit you well. It has many common and uncommon variants. This one also has some overlapping grid puzzles.
Sudoku Mix #1 by Logic Masters India: Classic Sudoku and 5 variants. Nice handcrafted puzzles. This one has a slowly increasing difficulty per variant. Good for beginning new variants.
Mutant Sudoku by Thomas Snyder and Wei-Hwa Huang A large number of puzzles per variant from easy to very hard. Some common and some uncommon variants. Very nice book, but does go outside the normal sudoku books a lot. I wish there were more books like this.
I personally get most my Sudokus online instead of books as I like variants more and there's more variety there. I have a few books that have satisfy my enjoyment of variants.
The Mammoth Book Of New Sudoku by Gareth Moore If you want a lot of puzzles, this will probably suit you well. It has many common and uncommon variants. This one also has some overlapping grid puzzles.
Sudoku Mix #1 by Logic Masters India: Classic Sudoku and 5 variants. Nice handcrafted puzzles. This one has a slowly increasing difficulty per variant. Good for beginning new variants.
Mutant Sudoku by Thomas Snyder and Wei-Hwa Huang A large number of puzzles per variant from easy to very hard. Some common and some uncommon variants. Very nice book, but does go outside the normal sudoku books a lot. I wish there were more books like this.