Sudoku Very Hard

sudoku : very hard (English Edition)            

George Douglas

Very Hard Sudoku Puzzles for Adults: Challenge Yourself with Over 1000 Sudoku Puzzles that Are Extremely Hard

Independently published

Very Hard Sudoku Puzzles for Adults - 600 Large Print Puzzles - Volume 10: Sudoku Games for Seniors

Independently published

SUDOKU - VERY HARD PUZZLES: VOL -2              

Independently published

SUDOKU - VERY HARD PUZZLES                      

Independently published

666 Sudoku: Puzzle book with 666 Hard & Very Hard Sudoku Puzzles in 9x9 with Solutions | 8,5 x 11 Inch | Vol 1

Fat Dog Publishing, LLC

Sudoku 1500 Very Hard Puzzles: Geisha Series Book: Volume 8

Independently published

Sudoku Very Hard: Sudoku Puzzles for Adults, Experts and Seniors in Large Print - Difficulty Level Extreme Hard - With Solutions

Independently published

100 Very hard Sudoku Puzzle for Adults with Solution: 16 x 16 Sudoku Puzzle Book Extreme Level large print

Independently published

Very Hard Sudoku Variety for Adults: An Advanced Collection of Classic, Jigsaw, Arrow, Akari, Windoku & More