The last time Charlotte James saw Van Gogh's famous sketch "Regret," it was hanging on the wall of a museum in Cardiff. So the version now lying on her desk has to be a fake - or does it?

Says author, Margaret Eleanor Leigh: "Beach reading, I call it, or influenza reading, perhaps. An intentionally droll romp with just enough substance to save it from outright silliness."

Join Charlotte James, Fine-Arts-Consultant-with-a-dodgy-past, and a cast of various other eccentric characters, on the trail of the elusive "Regret."