The Day of the Dissonance (Spellsinger, Book 3)

Clothahump, the wizard, is dying. All that can save him are rare medicinal powers to be found across the Glittergeist Ocean. Jon-Tom, the Spellsinger, sets out on the most perilous pilgrimage of his still-young career, armed with only his music-making duar and a reluctant Mudge, the otter, as his guide. Original.