Egypt may be most famously known for its pyramids, but nothing sets Dan and Amy's heads spinning more than receiving a clue left for them by their late grandmother, Grace Cahill. Could it be that all their lives Grace had been preparing Dan and Amy for this massive clue hunt, or are they about to face their biggest betrayal yet? With so many forces working against them, Dan and Amy are learning to trust in one another and with Nellie and Saladin close at hand, they are becoming a force to be reckoned with. Ages 9-12 215 pages