Shipwreck Detective Author:Richard Platt An old sea chest, a letter, a list of shipwrecks and a riddle...crack the code and find the sunken treasure with this underwater adventure. "Dear Duncan - A small fortune in gold could be yours - if you are smart enough to find it. I'm leaving a list of shipwrecks and a riddle - the rest is up to you..." Uncle Joe. Dive in and take the challenge... more » with Duncan Cameron to search for sunken treasure. There are real shipwrecks to explore, secrets to unravel, and a mystery to solve, plus flaps to unfold, charts to read, a compass, pieces of eight, maps, and much more to help your quest. Can YOU spot the clues along the way - and crack Uncle Joe's riddle?« less