Yōko (Pianist) Tanaka

Twelve-year-old Theodosia uses arcane knowledge and her own special talent when she encounters two secret societies, one sworn to protect the world from ancient Egyptian magic and one planning to harness it to bring chaos to the world, both of which want a valuable artifact stolen from the London museum for which her parents work.

Eleven-year-old Theodosia's ability to detect black magic raises her suspicions about a magician known as the Great Awi Bubu, while Henry, home for the spring holidays, discovers an artifact at the Museum of Legends and Antiquities that is coveted by every black-cloaked occultist in London.

Eleven-year-old inventor Sol must recover his self-confidence if he and his eight-year-old sister, Connie, are to escape the clutches of Hansel and Gretel's witch, to whom they have been led by their new stepmother and the man they believe to be their father.

When eleven-year-old Theodosia and her cat, Isis, travel to Egypt to return the Orb of Ra and the Emerald Tablet, she hopes to learn more about her origins but finds, instead, the Serpents of Chaos and a precious treasure that suddenly appears and disappears.

Two cats, one in the city and one in the country, chase mice before going to sleep.