Title: Amazing Sudoku Variants, Author: Conceptis Puzzles
Title: Sit & Solve Tight Fit Sudoku, Author: Wei-Hwa Huang
Title: Masterpiece Paint-doku, Author: Conceptis Puzzles
Title: Blockbuster Paint-doku, Author: Conceptis Puzzles
Title: Hitori & Sudoku, Author: Nikoli
Title: Pinwheel Paint-doku, Author: Conceptis Puzzles
Title: Sudoku Multipel: Butterfly, Cross, Flower, Gattai-3, Windmill, Samurai, Sohei - Volume 2, Author: David Badger