Danger continues to loom over Luke now that he's out of hiding in the second book in bestselling author Margaret Peterson Haddix's Shadow Children series.<br/><br/>Luke Garner is an illegal third child. All his life has been spent in hiding. Now, for the first time, Luke is living among others. He has assumed a deceased boy's identity and is attending Hendricks School for Boys, a windowless building with cruel classmates and oblivious teachers. Luke knows he has to blend in, but he lives in constant fear that his behavior will betray him.<br/><br/>Then one day Luke discovers a door to the outside. He knows that beyond the walls of Hendricks lie the secrets he is desperate to uncover. What he doesn't know is whom he can trust -- and where the answers to his questions may lead him...