Shadow Guy and Gamma Gal: Heroes Unite!

Shadow Guy and Gamma Gal: Heroes Unite! is a real life Club Penguin book. It is about the origin of Shadow Guy and Gamma Gal and how they teamed up.

Characters

 * Shadow Guy
 * Gamma Gal
 * Joe
 * Sensei
 * Gary the Gadget Guy
 * Aunt Arctic
 * Rory (cameo)

Trivia

 * It is revealed that Shadow Guy's real name is Sam, and Gamma Gal's name is Amy.
 * It is revealed that Sensei trained Gamma Gal.
 * It is also revealed that Gary the Gadget Guy trained Shadow Guy.