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."

As sixty-year-old John Gregory reflects on the past, he reveals how the world of ghosts, ghasts, witches, and boggarts was exposed to him and he later became the Spook, even though his first intention had been to join the priesthood

Tom is reunited with his mother and must return to Greece to face a new and terrible threat from the dark forces, and a momentous decision must be made, causing a serious rift between Tom and the Spook that threatens to separate them forever.

Provides insights into the life of Grimalkin, one of the deadliest witches in the country, if not the world, whose uneasy truce with the Spook's apprentice, Tom, unites them against the ultimate evil of the Fiend

The Last Apprentice series follows the terrifying adventures of the Spook's apprentice, Thomas Ward. But Tom's is only one story. There are others. . . .

The Spook himself was once an apprentice. How did he begin his training?

And what of Alice, the young witch who is Tom's closest ally? How did she overcome her dark past?

What did the witch assassin Grimalkin do to become the most deadly and feared witch in the county?

And,

...

When witches steal Tom's inheritance and kidnap his relatives, Tom, the Spook, and Alice set out for Pendle Hill, a particularly dangerous district, in hopes of preventing the three witch clans from uniting to raise the Fiend, the Devil himself, thus bringing about an age of darkness

As creatures of the dark hunt for the witch assassin Grimalkin, who carries the captured Fiend's head, Spook's apprentice Tom tries to find a way to finish this terrifying evil once and for all

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.

Once I felt someone touch the back of my neck. It felt like the tip of an ice-cold finger. But when I turned to look there was nobody there. Night falls, the moon rises, and fifteen-year-old Billy starts his first night as a prison guard. But this is no ordinary prison. There are haunted cells that can't be used, whispers and cries in the night...and the dreaded Witch Well. Billy is warned to stay away from the prisoner down in the Witch Well. But...