David Galloway is not content. A 35-year-old English teacher in a small private school in Marylebone‚ he isn't a writer or a boyfriend or a father. He isn't even a very good son. If he's not trawling fundamentalist websites‚ he's drinking with friends he doesn't really like or trying to avoid his neighbours. His new flatmate is James Glover‚ a barman whose life hasn't quite worked out either. Although he's a nice guy - a Christian and a small-town boy from East Anglia - he has certain fixed ideas about things.
Into the lives of these two dissatisfied bachelors comes Ruth‚ a successful American artist who taught David when he was an undergraduate at Goldsmiths. David notices that she has an exhibition in London and‚ ten years after last seeing each other‚ they reconnect and become friends‚ eventually even collaborating on work together.
Ruth meets Glover on David's doorstep and although she's 48 and he's 25‚ a relationship begins. David‚ as mutual friend‚ puts himself in the middle of it‚ and his interest in the couple grows obsessive‚ and eventually destructive.
Taking place in London‚ New York and Cape Cod‚ GLOVER'S MISTAKE an exploration into jealousy‚ friendship and the mind of a modern-day Iago.