Neuschwander, Cindy. <br/><br/>
Sir Cumference and the Isle of Immeter  a math adventure 
Cindy Neuschwander 
 - ed. 
 - [S.l.]  Charlesbridge  2006 
 - 32 p. 
<br/><br/><label>ISBN: </label>0329471805 0329539515 9781570916809 (hardcover) 9781570916816 (pbk.)