Jones, Diana Wynne. <br/><br/>
Dark Lord of Derkholm / 
Diana Wynne Jones. 
 - New York :  Greenwillow Books,  1998. 
 - 345p 
<br/><br/> Derk, an unconventional wizard, and his magical family become involved in a plan to put a stop to the devastating tours of their world arranged by the tyrannical Mr. Chesney. 
<br/><br/><label>ISBN: </label>0-688-16004-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fantasy<br/>Magic--Fiction