Variety Puzzle Books for Adults - 400 Master Puzzles 9x9: Killer Sudoku, Killer Sudoku X, Killer Sudoku Jigsaw, Argyle Killer Sudoku (Volume 18)

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 master puzzle.

The variety puzzle books for adult's series contain:
- 100 Killer Sudoku
- 100 Killer Sudoku X
- 100 Killer Sudoku Jigsaw
- 100 Argyle Killer Sudoku
- Handy 6 x 9 inch Book Layout
- 2 Puzzles per Page
- Ideal for Experts

In the book you will find a description and examples of solutions for each type of logical puzzles and solve all puzzles.
The book is for those who like logic and math problems. Decide, developing and improving.