Son of children's author Jamila Gavin (The Surya trilogy, Coram Boy).
His debut novel, the children's mystery Knightey & Son, won the Kirkus Best Children's Book of 2014.
While working as a screenwriter in LA, Gavin adapted several novels for 20th Century Fox, including Manhattan Nocturne, A Year In The Merde, The Stars My Destination and Stainless Steel Rat.