Apprentice Septimus Heap must enter the Darke to save the Castle and the Wizard Tower from destruction, but he needs the help of many to battle the spreading Darkenesse.

When apprentice librarian Elisabeth is implicated in sabotage that released the library's most dangerous grimoire, she becomes entangled in a centuries-old conspiracy that could mean the end of everything.

Young wizard's apprentice Connwaer travels to the city of Desh to find the source of the malevolent Shadows who are plaguing Wellmet City.

Connwaer, the young thief-turned-wizard's apprentice, escapes from prison and follows the call of magic to the distant and mysterious Dragon Mountain on a quest to save Wellmet from Arhionvar, dread magic that can destroy the city.

"Ten-year-olds Pearl and Ben find excitement in the small town of Buttonville as they encounter otherworldly animals, including a lake monster, during their first official day as apprentices to Dr. Woo, a veterinarian for Imaginary Creatures"

In early twentieth-century New York, Sacha Kessler's ability to see witches earns him an apprenticeship to the police department's star Inquisitor, Maximillian Wolf, to help stop magical crime and, with fellow apprentice Lily Astral, Sacha investigates who is trying to kill Thomas Edison, whose mechanical witch detector that could unleash the worst witch-hunt in American history.

Pulled through a glass that brings him back in time, Septimus Heap becomes the apprentice of an alchemist.

"Ten-year-olds Pearl and Ben continue their apprenticeships at Dr. Woo's Worm Hospital as they travel with Dr. Woo to the Tangled Forest and the Dark Forest in search of a missing unicorn, and learn more about the villainous Maximus Steele"--

Wolf Boy is sent on a Task by Aunt Zelda, while Septimus and the dragon, Spit Fyre, fly off to bring their friends home, but they all wind up on an island whose secrets are as dangerous as its inhabitants.

The continuing adventures of Tom, the seventh son of a seventh son and apprentice to the local Spook, who faces danger and death daily in his job protecting the region from evil.