Alan Dean Foster 
Son of Spellsinger [EPUB ebook] 

Call him "Spellmaster Jr." Much to Clothahump the Wizard’s distress, ex-hippie Jon-Tom and otherworldly Talea’s son Buncan wants to be a questing hero, but not a spellsinger. Instead he forms a band with Mudge’s kids, otters Nocter and Squill, one that creates a wild, unpredictable magic – based on rap! Then an anteater arrives with rumours about a dangerous legend. Soon the young rappers, aided by a drunk rhino, are off on an odyssey to a fortress where evil sorcerers threaten the world. And where only the unknown power of Buncan’s beat can stop the hordes of hideous hybrids…