Alan Dean Foster 
Time of the Transference 

There’s no place like home… It was a pretty good life for a spellsinger from L.A. He’d battled demons, fought deadly Plated Folk, even met a socialist dragon and survived. Now Jon-Tom was quite happy to settle into domestic bliss with the fiery Talea, study magic, and practice spellsinging on his duar. But the magic instrument is broken when Jon-Tom protects the wizard Clothahump from thieves and he must set out across the Glittergeist Sea to find the one person who can fix it. With the irrepressible Mudge the Otter as a travelling companion, only the unexpected can happen. But cannibal muskrats, ogres, and a fierce pirate king parrot must seem ordinary indeed when Jon-Tom finds a way back to Earth — and he must choose which world is home.