Scarrow, Alex <br/><br/>
Time riders :  the doomsday code  / 
Alex Scarrow 
 - London :  Puffin,  2011 
 - 437 p. ;  20 cm. 
<br/><br/><label>ISBN: </label>9780141333489 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time travel--Juvenile fiction<br/>Space and time--Juvenile fictio