Ultimate Book of Spells is a German children's animated television series produced by BKN International. It ran for twenty-six episodes, having been cancelled.

Inspired by the popular Harry Potter book and movie series, the show presents a trio of "wizards-in-training" at an enchanted private school run by Miss Crystalgazer. Cassy is a junior witch, Gus is a half-elf/half-human junior wizard, and Verne is a promising "mortie", i.e. a non-magical human. With the guidance of the talking Ultimate Book of Spells (aka UBOS), the three have to battle the evil wizard Zarlak, who's trying to steal all of the world's spells.

Copyright to the Ultimate Book of Spells series was acquired by EMBA Media Associates Limited from BKN International AG on March 20, 2015.