In this pivotal book in the Sammy Keyes series, Sammy tackles the persistent mysteries of her own life.<br><br>Mysteries like: Who is her father? And why has her mother kept it such a secret? How long can she manage to hide out in Grams' seniors-only building before someone catches on? Is her mother really planning to marry her boyfriend's father? (Ew.) And why, <i>why</i> is Heather Acosta so nasty?<br><br>During one crazy weekend in Las Vegas, with the help of an entire army of Elvis impersonators, Sammy finally gets some answers. But of course knowledge comes at a price—and solving the mysteries of her own life will cost Sammy more than she ever meant to pay. . . .