The Wizard in the Tree by Lloyd Alexander

This book is about a kitchen maid, Mallory. She works in Mrs. Parsley's kitchen. Oneday Mallory finds a wizard named Aribican. He had been stuck inside a tree. Aribican had been on his way to Vale Innis, a magical place. Sine Mallory got him out of the tree Mallory wanted the little enchanter to give her three wishes. When the Aribican tried to make something by magic, it doesn't work. His power has seemed to gone out of control. Aribican turns himself into a duck and all sorts of other animals when he his only trying to do some basic magic.

Meanwhile the squire Scrimqueor was very bad. Mallory was treated horribly. Mr. Parsel was the only nice man. Other than Aribican of course. But as the days go on Aribican and Mallory help each other through there problems. To find out what happened read the book!