When mummies go missing all over London, eleven-year-old Theodosia puts aside her fight against the Serpents of Chaos to save her father, who is suspected in the thefts, all the while avoiding a string of new governesses.
Beastologist-in-training Nathaniel Fludd and his Aunt Phil nurse a mysteriously ill unicorn, try to stop Obediah from taking the unicorn's horn, and finally get a solid lead on the whereabouts of Nathaniel's parents.
The continuing adventures of beastologist-in-training Nathaniel Fludd as he accompanies his intrepid Aunt Phil on a dangerous mission across West Africa to find a deadly basilisk that's missing and begins to find clues relating to the mysterious disappearance of his parents.
When Nathaniel and Aunt Phil are summoned to the Welsh countryside to calm the giant dragons known as wyverns, they suspect the problem was caused by the same sinister man who has been trying to steal the Book of Beasts.
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.
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.
In 1928, when timid ten-year-old Nate learns that his parents have been lost at sea, he joins his father's cousin on a flight to Arabia where they must oversee the death and rebirth of the phoenix, thus beginning his training as a "beastologist."
Ten-year-old Wat, a crippled boy living in Norman England, rescues two baby falcons and is led to discover the grandfather he never knew and the powerful magic that resides in the deep forest and in himself.
Twelve-year-old Theo 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.