When Heidi was just a newborn, she and her mentally disabled mother mysteriously appeared at the door of their kindly next-door neighbor, Bernadette. Although Bernadette has agoraphobia and is afraid to leave home, she discovered a connecting door between the two apartments that made it possible for her to look after Heidi and her mother. The three of them create their own unique household and family bond. As a young child, Heidi is content and has little reason to question her origins or her unusual living arrangement. However, at age 12 several nagging questions begin to haunt her. Her mother calls herself So B. It… does she have another, more conventional name? And what is the meaning of the strange word, soof – the only word in her mother’s 23-word vocabulary that isn’t a common one? When Heidi discovers some old photographs showing her mother at a Christmas party in Liberty, New York, she vows to find answers about her family history… even though it means embarking on a solo cross-country bus trip from Reno to New York. In So B. It, author Sarah Weeks has created a strong and likable heroine. You’ll find yourself routing for Heidi in her quest to unravel the mysteries of her past and discover her true identity. Recommended for grades 6-9.