Sir Dinadan and his friend Sir Palomides, Sir Gaheris, Sir Terence, and other knights of the Round Table and their associates try to stop Mordred and his White Horsemen from ending King Arthur’s rule of Great Britain.
- ISBN: 9780547144207
- Author: Gerald, Morris
- Published: 2010 , Houghton Mifflin Books for Children
- Themes: action and adventure, Arthurian legend, King Arthur, knights, Medieval England
- Descriptors: England (UK), Folklore and Fairy Tales, Intermediate (ages 9-14)
- No. of pages: 293