Returning from Greece, Tom and the Spook find that their home, including the Spook's precious library of knowledge, has been burned to the ground, and that their battle against the denizens of the dark must continue.

"Tell no one what I've given you." Until he got that cryptic warning, Christopher Rowe was happy, learning how to solve complex codes and puzzles and creating powerful medicines, potions, and weapons as an apprentice to Master Benedict Blackthorn, with maybe an explosion or two along the way. But when a mysterious cult begins to prey on London's apothecaries, the trail of murders grows closer and closer to Blackthorn's shop With time running out,...

Young Tom, the seventh son of a seventh son, starts work as an apprentice for the village spook, whose job is to protect ordinary folk from "ghouls, boggarts, and all manner of wicked beasties."

"Cyrus and Antigone must track down Phoenix and the Dragon's Tooth while facing a threat from the transmortals"--

"All sorcerers are evil. Elisabeth has known that as long as she has known anything. Raised as a foundling in one of Austermeer's Great Libraries, Elisabeth has grown up among the tools of sorcery -- magical grimoires that whisper on shelves and rattle beneath iron chains. If provoked, they transform into grotesque monsters of ink and leather. She hopes to become a warden, charged with protecting the kingdom from their power. Then an act of sabotage...

Eleven-year-old Rupert cannot resist applying to an advertisement to be a witch's apprentice, but quickly finds himself over his head with the young witch-in-training who desperately needs his help.