Intrepid Theodosia, age 11, narrates a fantasy steeped in invented and authentic Egyptology, clashing secret societies and pre-WWI European intrigue. Theo’s workaholic father runs the Museum of Legends and Antiquities, its inferiority complex (with the British Museum) assuaged by the artifacts that Mum ships from her excavation of Thutmose III’s tomb. Theo obsessively researches ancient Egypt, uncannily able to physically intuit and ameliorate curses and “black magic” intact in the ancient objects surrounding her. A complex plot involving the return of the bejeweled “Heart of Egypt” to its proper place in Thutmose III’s tomb pits Theo against evildoers bent on destabilizing Europe and seizing power. LaFevers overplays happenstance and Theo’s naiveté as unreliable narrator to pass off bits of fortuitous plotting. Theo careens off to both Giza and the Valley of the Kings without her parents’ knowledge. Stock characters and a school of red herrings crowd the narrative; the cracking good tomb showdown rewards persistent—or unfussy—readers. (Fantasy. 9-12)