Variety Puzzle Books for Adults - 400 Normal Puzzles 9x9: Killer Sudoku, Killer Sudoku X, Killer Sudoku Jigsaw, Argyle Killer Sudoku (Volume 16)

Numerical logic puzzles are puzzles that use the numbers and the set of rules to deal with them.In this book you can find Killer Sudoku, Killer Sudoku X, Killer Sudoku Jigsaw and Argyle Killer Sudoku.
With a great variety of number Puzzles this series is ideal for brain training and keeping your mind active.
The number of puzzles in the book is 400 puzzles. This book contains normal puzzle. The variety puzzle books for adult's series contain:
- 100 Killer Sudoku
- 100 Killer Sudoku X
- 100 Kill...