Osborne, Mary Pope <br/><br/>
The knight at dawn / 
by Mary Pope Osborne ; illustrated by Sal Murdocca. 
 - New York :  Random House,  1993. 
 - 65 pages :  black and white, illus. ;  19 cm 
<br/><br/> Eight-year-old Jack and his younger sister Annie use the magic treehouse to travel back to the Middle Ages, where they explore a castle and are helped by a mysterious knight 
<br/><br/><label>ISBN: </label>978-0-590-62351-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time travel--Fiction.<br/>Castles--Fiction.<br/>Middle Ages--Fiction.<br/>Knights and knighthood--Fiction.<br/>Magic--Fiction.<br/>Tree houses--Fiction.
<br/><br/><label>Dewey Class. No.: </label>IBED-EFic. Os81 1993