Bright young things - Scarlett Thomas

'Bright Young Things wanted for Big Project.'

They're in the prime of their lives but our bright young things are all burnt out. Six sparky twenty-somethings just out of university and working dead-end jobs, they are all bored to tears with their lives and looking for a way out. When a mysterious job is advertised in the newspaper, they all apply.
What they least expect is to find themselves prisoners on a deserted island. There's food in the fridge and they have a bedroom each, but there's no telephone, no television, and no way to escape.