Her first novel, My Sister Lives on the Mantelpiece, deals with the tragedy of a family torn apart by a terrorist attack.
It won a Royal Society of Authors' Betty Trask Award, the Hull Children's Book of the Year and the prestigious 2012 Branford Boase Award for most outstanding debut novel.
Pitcher's second novel, Ketchup Clouds, won the Waterstones Children's Book Prize.
Before her first book was published, Annabel trained as a teacher and taught English at Wakefield Girls' High School.
2012 Branford Boase Award 2013 Waterstones Children's Book Prize