Will Shortz Presents Double Dip Sudoku: 200 Medium Puzzles

Hungry for more sudoku?
Once you've mastered the easy puzzles it's time to take it up a notch!
This book is the second in the series that starts with Will Shortz Presents Single Scoop Sudoku and ends with Will Shortz Presents Triple Threat Sudoku.

Includes:
-200 medium-level puzzles
-Perfect portable size
-Edited by Will Shortz