Ultimate Book of Spells is a Canadian children's animated television series produced by BKN International. It first premiered on YTV Channel for kids in Canada. 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.

In the U.S. DVD release of this series, "Solo Sorceress" is not the final episode as the episode occurs significantly earlier in the play order.

On 19 April 2001, BKN pre-sold the series to CBBC in the United Kingdom.

On 20 June 2002, Toon Disney purchased the North American broadcast rights for the series.

In 2021, the show started airing on London Live in the United Kingdom.

In the United Kingdom, Universal Pictures Video released two VHS volumes. The first - "Three is a Charm", was released in 2002, and the second: "Solo Sorceress" was released on 21 April 2003. A double-pack containing both tapes was also released.

"Three is a Charm" was later released on DVD by Universal on 10 May 2004.

A VHS tape containing two episodes titled "The Mystic Gem" was released at an unknown date.