Hyper Sudoku
Subtitle: 250 Very Hard Four-Box Sudoku Puzzles
Publisher: Independently Published; Independently published
Published: Aug 10, 2019
Format: paperback
Number of pages: 144
ISBN-13: 9781089454847
Notes: Source title: Hyper Sudoku: 250 Very Hard Four-Box Sudoku Puzzles (Windoku)