The blue book

"Elizabeth Barber is crossing the Atlantic by liner with her perfectly adequate boyfriend, Derek, who might be planning to propose. In fleeing the UK - temporarily - Elizabeth may also be in flight from her past and the charismatic Arthur, once her partner in what she came to see as a series of crimes. Together they acted as fake mediums, perfecting the arcane skills practised by effective frauds. Elizabeth finally rejected what once seemed an intoxicating game. Arthur continued his search for the right way to do wrong. The pair still meet occasionally, for weekends of sexual oblivion, but their affection lacerates as much as it consoles. She hadn't, though, expected the other man on the boat."--Publisher description.