This unique puzzle book is filled with 300 puzzles that not only challenge but teach new methods for problem solving. It has 100 perceptual puzzles, 100 numerical games and 100 games of logic.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.