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.

Lore Keeper apprentice Barclay helps his teacher investigate a carnivorous algae bloom and its possible connection to recurring attacks by the Legendary Beast of the Sea.

"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"

Publisher Annotation: After their plan to rescue the prince of Gallica has gone horribly wrong, Will Treaty and his apprentice, Maddie, are being held captive at the Chateau des Falaises in Gallica. The dangerous baron Lassigny is intent on keeping them—and the prince—no matter what. But Will and Maddie are determined to escape. If they ever want to return to their home, they’ll have to find ways to outwit the baron and get outside the locked...

After rescuing Mr. Leery from the evil queen, Penny, Luke, and Natalie find Mrs. Bender, the principle of Morgantown has made some strange changes, what is wrong with the adults in town?

"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"--

Apprentice Tom and the Spook for whom he works flee to Ireland, where a powerful witch has joined forces with the dark mages trying to call forth ancient powers to destroy Tom.

"The Herons are home in Skandia, but the usually peaceful country is in danger. The Temujai--ruthless warriors from the Eastern Steppes--have never given up on their ambition to claim Skandia for their own...and now they're on the move. Hal and his crew will have to brave the treacherous icy river and rapids to stop them, no matter the cost"--

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

In 1665 London, fourteen-year-old Christopher Rowe, apprentice to an apothecary, and his best friend, Tom, try to uncover the truth behind a mysterious cult, following a trail of puzzles, codes, pranks, and danger toward an unearthly secret with the power to tear the world apart.