Paths of the Perambulator (Spellsinger 5)

Paths of the Perambulator (Spellsinger 5) by Foster, Alan Dean. paperback edition. ISBN: 9781857230918.

There goes the neighborhood! Nobody wants to be around when a freak of supernature called a Perambulator enters the world, bringing with it some really weird shifts in the fabric of existence...like suddenly turning Jon-Tom into a giant blue crab, or Mudge the Otter into a nasty disease... But the mad Perambulator is there to stay, unless the wizard Clothahump can muster all his power and boot it into the next dimension. So, despite the bumblings of Sorbl the drunken owl and the fitful runes of a koala amateur wizard, Jon-Tom, Mudge, and Clothahump make their way ever deeper into the realms where Chaos perambulates...to find a deadly foe that only the combined forces of illogic can hope to defeat....