Big Book Sudoku X - 500 Normal Puzzles 9x9 (Volume 3)

Sudoku X also called Diagonal Sudoku.
Each puzzle consists of a 9x9 grid containing given clues in various places.
The object is to fill all empty squares so that the numbers 1 to 9 appear exactly once in each row, column, diagonal and 3x3 box.

The puzzle books series contain:
- 500 Normal Puzzles
- Handy 6 x 9 inch Book Layout
- 6 Puzzles per Page
- Ideal for Beginners

The book is for those who like logic and math problems. Decide, developing and improving.