Extence won the Waterstones 11 literary prize for his first book The Universe Versus Alex Woods (2013).
[1][2] The Universe Versus Alex Woods is Extence's début novel and is "the everyday tale of a teenage science nerd hit by a meteorite who strikes up a friendship with a pot-smoking Vietnam veteran".
[3] It is the story of wilful teenager Alex, who acquires a fascination with science and astronomy after being struck by a falling meteorite and going into a coma.
After recovering, Alex forms an unusual friendship with an aged, dope-smoking Vietnam veteran, the reclusive Mr. Peterson, who is a dedicated aficionado of Kurt Vonnegut.
[4][5] His second book The Mirror World of Melody Black was released in 2015 and follows a young girl's descent into mental illness.