Who wrote the 1978 novel 'The World According to Garp'?

'The World According to Garp' is John Irving's fourth novel, about a man, born out of wedlock to a feminist leader, who grows up to be a writer. Published in 1978, the book was a bestseller for several years. It was a finalist for the National Book Award for Fiction in 1979, and its first paperback edition won the Award the following year.

A movie adaptation of the novel starring Robin Williams was released in 1982, with a screenplay written by Steve Tesich.

BBC Radio 4's Classic Serial broadcast a three-part adaptation of the novel by Linda Marshall Griffiths in January 2014. The production was directed by Nadia Molinari and featured Miranda Richardson as Jenny, Lee Ingleby as Garp, Jonathan Keeble as Roberta and Lyndsey Marshal as Helen.