Osborne, Mary Pope. <br/><br/>
Monday with a Mad Genius (Magic Tree House, No. 38, A Merlin Mission). 

 - 110  p. 
<br/><br/> Monday with a Mad Genius (Magic Tree House, No. 38, A Merlin Mission) by Mary Pope Osborne (2012) 
<br/><br/><label>ISBN: </label>0545148820