Reynie Muldoon, an 11 year old orphan, is about to join an incredible but dangerous adventure by deciding to answer this ad: "Are you a gifted child looking for special opportunities?" With a dozen other smart kids, he is submitted to a series of unusual tests. At the end of it, only four children are selected. Each of them prove to be very clever but each in a different way. The reader will enjoy doing their best to solve mysteries with this amazing team. A delightful read highlighting the power of friendship and teamwork. Definitely a must-read!