My Brother's Name is Jessica

My Brother's Name is Jessica by Boyne, John. hardcover edition. ISBN: 9780241376133.

Sam Wavers life has always been pretty quiet. A bit of a loner, he struggles to make friends, and his busy parents often make him feel invisible. Luckily for Sam, his older brother, Jason, has always been there for him. Sam idolises Jason, who seems to have life sorted - hes kind, popular, amazing at football, and girls are falling over themselves to date him. But then one evening Jason calls his family together to tell them that hes been struggling with a secret for a long time. A secret which quickly threatens to tear them all apart. His parents dont want to know and Sam simply doesnt understand. Because what do you do when your brother says hes not your brother at all? That hes actually . . . your sister?