Silent to the Bone

This is an okay book written by E.L. Konigsburg. 13-year-old Branwell Zamborska is struck dumb and his baby half-sister, Nikki has slipped into a coma. Branwell dials 911 after realizing she is not breathing properly, but when the emergency operator answers, Branwell cannot speak. Vivian Shawcurt, the au pair from England, takes over. She tells the emergency medical team that Branwell dropped Nikki and shook her. After he is sent to the Clarion County Juvenile Behavior Center, his best friend Connor visits to see if he can break the silence and find out what happened.