Griddlers Logic Puzzles: Black and White (Volume 20)

• Paperback: 108 pages
• Publisher: Griddlers.net; 1 edition (October 27, 2016)
• Language: English
• ISBN-10:  9657679222
• ISBN-13: 978-9657679227
• Product Dimensions: 8 x 0.2 x 10 inches
• Available on Amazon or Createspace