This book paints a vivid picture of life with an autistic teenager. Tilly's family find it increasingly hard to cope with her & desperation leads them to leave their city life to join 'Camp Harmony' a sort of commune for families with problem children. I loved the joint narrative by Tilly's mother and her younger sister Iris, & the gripping way the story unfolds. Humour and sadness intermingle, compulsive reading as the inevitable tragedy occurs.