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Hoffman's Difficult Sudoku 1: 100 Puzzles George Hoffman
Hoffman's Difficult Sudoku 1: 100 Puzzles
George Hoffman
| Media | Books Paperback Book (Book with soft cover and glued back) |
| Released | July 8, 2014 |
| ISBN13 | 9781500454333 |
| Publishers | Createspace |
| Pages | 206 |
| Dimensions | 216 × 279 × 11 mm · 489 g |