The Perfect Other: A Memoir of My Sister

All Kait Leddy had ever wanted was a little sister. When Kyleigh was born, they were inseparable; Kait would protect her, include her, cuddle and comfort her, and, to Kyleigh, her big sister was her whole world.

As they grew, however, and as Kait entered adolescence, her personality began to change. She was lashing out emotionally and physically, and losing touch with reality in certain ways. The family struggled to keep this side of Kait private-at school and in her social life, she was sti...