Wizard's Vacation (Sythyry's Journal, #3)

A century later, Sythyry is an powerful wizard. It's time for zir first vacation ever — in a flying castle full of variously inappropriate friends, and one devastatingly insane and powerful monster. Off to the furthest reaches of World Tree civilization! Despite sky pirates, stowaways, foreign customs, evil high priests, friends and other traitors, restaurants specializing in deadly mushrooms, carpentry, soul-contaminating magical disasters, embezzlements, side excursions to Heaven, tofyofs, angry parents, and, of course, the lurking possibility of a terrible romance.