The ogre of Oglefort - Eva Ibbotson

When a Hag, an orphan boy called Ivo, Ulf the troll and wizard Brian Brainsweller are sent to rescue a princess from an ogre, they briefly consider running away and hiding. Can they be any match for the gruesome, terrifying, ghastly, flesh-eating Ogre of Oglefort? But not all is as it first appears - the Ogre is depressed and the princess doesn't want to be rescued. The Norns, who rule their fates, decide to take things in hand and send a gang of the vilest, most petrifying ghouls to get the job done properly . . .
The Ogre of Oglefort is a wonderfully spooky young-fiction title from the award-winning author of Journey to the River Sea, Eva Ibbotson.