A mysterious letter. A treasure hunt. Can you solve 10 puzzles and outrace your enemies to a lost fortune.   Ryan Creed is a cryptology professor with a passion for solving even the toughest of riddles. A letter from an unknown client leads him to Seattle, where he accepts a new assignment: to find a cache of priceless lost coins. With help from the multitalented Sarah Corbet, Ryan embarks on his quest—but there are other, more sinister, hunters seeking the coins too. Before they know it, Ryan and Sarah find themselves on a thrilling adventure packed with puzzles and pitfalls! Paperback Book With Flaps; 6 X 8 1/2 inches; 192 pages.