Spellsinger is the title of the first book in the series of the same name, by Alan Dean Foster. The books feature a young pre-law student by the name of Jonathan Thomas Meriweather, who wishes to be a rock musician despite a distinct lack of singing talent. After a pot-smoking bender, he wakes up in a mysterious alternate universe inhabited by talking animals. Jon-Tom, as he is known there, discovers that he was summoned by the tortoise wizard Clothahump to assist in the fight against the evil insects of the Greendowns, and manifests the powers of a "spellsinger."