Osborne, Mary Pope <br/><br/>
Monday with a mad genius / 
by Mary Pope Osborne, illust; by Sal Murdocca. 
 - 1st ed. 
 - New York :  Random House,  2007. 
 - 110 
 - Magic Tree House .
<br/><br/> Jack and Annie travel 500 years back in time to Florence, Italy, and spend a day helping Leonardo da Vinci in the hope of learning another secret of happiness. 
<br/><br/><label>ISBN: </label>9780375837296 
<br/><br/><label>LCCN: </label>2006101209 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Leonardo da Vinci 1452-1519--fiction.<br/>Time travel--fiction.<br/>Magic--fiction.<br/>Brothers and sisters--fiction.<br/>Curiosity--fiction.<br/>Florence (Italy)  history--fiction.<br/>Italy-History-1492-1559--fiction.