Although he is now best known as a children's writer, Justin Richards is also the author of dozens of genre and science fiction novels, as well as non-fiction books, audio scripts, television and a stage play. He has edited books of short stories, been a technical writer and worked as odd-job man in a hotel for postal workers.

Justin is the author of the popular children's series "The Invisible Detective" and also the series "Time Runners." For younger children, Justin writes the "Agent Alfie" series - about a boy who finds himself at a school for the children of spies and secret agents. Though Alfie's own dad is a postman.

Justin's novel for older children - "The Death Collector" - was first published in 2006, followed by "The Chaos Code" in 2007 and "The Parliament of Blood" in 2008, with "The Chamber of Shadows" following in 2010. His series "The School of Night" also started in Autumn 2010.

He has co-written several action thrillers for older children with the acknowledged master of the genre Jack Higgins. Justin acts as Creative Consultant to BBC Books' range of "Doctor Who" titles, advising on the commissioning and editing of all the company's Doctor Who titles as well as writing quite a few himself.

Married with two children (both boys), Justin lives and works in Warwick, within sight of one of Britain's best-preserved castles.