The Natural Law

Part-time PI Paul Rook—the "brilliantly original detective"—returns in this high-concept, thrilling sequel to Philosophical Investigations (Robert Foster, bestselling author of The Lunar Code).

Dr. Paul Rook's life is a mess: he drinks too much, his wife has left him for his best friend, and he spends his days teaching philosophy to students who aren't interested at all. Thankfully, he has another life—a sideline career as a private investigator. So when he meets Mary King, whose small-time criminal husband has been shot dead in an Istanbul hotel room, he gladly takes the case.

Almost immediately a mysterious character, known only as Gladiator, begins to send text messages to Rook, warning him off the trail. As the messages continue, the body count starts to mount. Rook soon finds himself immersed in the murky world of crooked politicians, shady arms deals, and a web of criminals and cover-ups that extends further than he could ever have imagined . . .