Name all the animals - Alison Smith

As children, Roy and Alison Smith were so close their mother called them by one name: Alroy. But on a cool summer morning when she was fifteen, Alison woke to learn that Roy, three years older, was dead. While her Catholic parents wrestled with their faith and their grief, Alison made the mourners coffee, went to school to be taught by the nuns, and - being all her parents had left - set about coping.
But underneath run her private rituals of mourning, her increasing idiosyncrasies, unnoticed by her parents trying to heal themselves and teachers anxious to be kind. Until suddenly, Alison begins to realize something's wrong.
This is a book about grief, but it's also a love story, about Alison's love of her brother, of her childhood, and finally of life.