The 39 Clues Beyond the Grave - 04

Betrayed by their cousins, abandoned by their uncle and with only the slimmest hint to guide them, fourteen-year-old Amy Cahill and her younger brother Dan rush off to Egypt on the hunt for the 39 clues that lead to a source of an unimaginable power, but when they arrive, Amy and Dan get something completely unexpected, a message from their dead grandmother, Grace, set out to help the two orphans or are Amy and Dan heading for the most devastating betrayal of them all?