The Green Book of Sudoku 2 200 Puzzles, by The Puzzle Society
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- ISBN: 9780740791161 | 0740791168
- Cover: Paperback
- Copyright: 4/13/2010
Two of America's hottest pastimes meet on the pages of The Green Book of Sudoku 2. Go green while exercising your brain with 200 Sudoku puzzles printed on 100 percent recycled paper with biodegradable and environmentally friendly soy ink. The Green Book of Sudoku 2 features puzzles of five increasing difficulty levels, along with a complete solution key. So sharpen your pencil and your mind, and go green along the way.