Vanished

For millions of Londoners, the morning of 17 December is just like any other. But not for Sam Wren. He boards a tube train, and never gets off again. No eyewitnesses. No trace of him on security cameras. Six months later, he's still missing.
David Raker has made a career out of finding the lost. Enlisted by Sam's desperate wife, Raker must unearth secrets that go deeper than anyone could have imagined if he hopes to find Sam. Someone knows what happened on the tube that day, and they'll do anything to keep Sam's secrets firmly buried . . .