Theodosia and the Serpents of Chaos, by R.F. LaFevers, 2007

(1905) 11-year old Theodosia Throckmorton sleeps in a sarcophagus and lives in a dusty London museum of antiquities, because her father usually can’t be bothered to go home at night and send her to school like he ought to. Her mother returns home from Egypt bearing loads of artifacts positively steeped in curses, which only Theo can detect and eradicate. But when a plot of German conspirators steal the Heart of Egypt from Theo’s mother, Theo takes matters into her own hands.