the Calcudoku Series - December: 100 puzzles of great variety every month

by Patrick Min

This is the twelfh (December) and final issue of the new "Calcudoku Series" puzzle books. Each month there will be a new puzzle book with 100 Calcudoku puzzles of the greatest variety (from easy to difficult, with twins, "no-op" puzzles, single operator, patterned, up to 15x15 in size!), at the lowest possible price.And solutions to the difficult puzzles in the book can be submitted at calcudoku.org for points!

• Format: Paperback
• Language: English
• ISBN: 154058108X
• ISBN13: 9781540581082
• Release Date: December 2016
• Publisher: CreateSpace Independent Publishing Platform
• Length: 110 Pages
• Weight: 0.56 lbs.
• Dimensions: 9.6" x 0.3" x 6.7"