Theodosia and the Staff of Osiris is the sequel to Theodosia and the Serpents of Chaos, and the second installment in the Theodosia series.
[Look out--there are spoilers for the first book!]
After saving England from the sinister actions of the Serpents of Chaos, trouble has died down for Theodosia Throckmorton, daughter of the head curator of a London archaeology museum. Clearly, though, some peaceful time to catalog artifacts and remove some nasty lingering curses is too much to hope for, because after uncovering an artifact she is fairly certain is the legendary Staff of Osiris--imbued with the power to raise the dead--in the museum's basement, a small platoon of mummies appear in the foyer. The police are convinced her father stole them, but Theodosia believes they were summoned by the Staff of Osiris--and that the Serpents of Chaos are well aware of the mummies' unusual behavior.
Determined to clear her family name, outwit the Serpents of Chaos, and avoid her grandmother's latest succession of prospective governesses, Theodosia sets out to solve this latest mystery before the Serpents of Chaos succeed in their latest plan--and use the Staff of Osiris for something far more sinister than moving the dead.
Once more, Theodosia Throckmorton does not disappoint. Somewhat like a fantasy version of Flavia de Luce, she manages to be witty, sharp, and indisputably an eleven-year-old in the best possible way, making this series constantly surprising, unexpected, and brilliantly clever. Combining fantasy, mystery, historical fiction, and ancient Egyptian archaeology, Theodosia has a bit of everything, and it's all pulled off brilliantly well. I highly recommend Theodosia and the Staff of Osiris and the Theodosia series to readers ages ten and up who enjoy mysteries and fantasy novels.