"Wife likes this stuff. Way beyond my patients but she loves doing this."

—Don

"This book is very challenging even for a cryptogram fanatic as it progresses. It also offers little known facts in the script."

—Diane

“I have become an avid Sudoku fan. I really like this particular book and the way it’s set up. I have gone through four of them already. I’m having so much fun!“

—April

“Great level of difficulty. I love that pages are if good quality and white so that you can erase clearly snd that all puzzles are of the same level of difficulty.“

—Didi

“These ARE hard puzzles--humbling to one who's been getting through other books rated "challenging" fairly quickly…great quality and fine to work on at home.”

—Carla

“Awesome puzzles.”

—Nicole

“Great fun. Definitely amazing fun for hours.”

—Karina

“Great puzzle book. I think anyone who enjoys Sudoku would like this collection.”

—Ann

“As advertised, the puzzles are hard! “

—Choctawdan

“Very enjoyable. Helps the brain per many Doctors. Stimulate my brain.”

—Carolyn

“Perfect for the senior set! Sudoku is good for the brain as we get older.”

—Sunny