Will Shortz Presents Sudoku in the Sky
Subtitle: 200 Easy to Hard Puzzles
Publisher: St. Martin's Griffin
Published: Apr 28, 2015
Format: paperback
Number of pages: 320
ISBN-13: 9781250069030
Notes: Source title: Will Shortz Presents Sudoku in the Sky: 200 Easy to Hard Puzzles (New York Times)