Lerangis, Peter. <br/><br/>
The code  
by Peter Lerangis. 
 - New York :  Scholastic,  c2004. 
 - 139 p. ;  20 cm. 
 - Spy X ;  #1 .
 - Lerangis, Peter.  Spy X;  #1. .
<br/><br/> "An Apple paperback." 
<br/><br/> Leaving only a cryptic note, Andrew and Evie's mother vanishes on their eleventh birthday, and now almost a year later, the twins receive a mysterious package from someone named Spy X. 
<br/><br/> 570  Lexile. 
<br/><br/><label>ISBN: </label>0439507251 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mystery and detective stories.<br/>Twins--Fiction.