"Andrew Crain's groundbreaking work with lithium has made him one of the world's richest men. He is universally adored and admired, until Crain's wife, Laura, comes to Spenser hoping he can find out what skeletons lurk in her husband's closet. He has recently become secretive, bordering on paranoid, and prone to violent outbursts. As Spenser digs into the billionaire's past, he realizes that the man may have done terrible things on his rise to the top--but he also may have had good reason to. There are no clear answers here, and what Spenser discovers will place him in grave danger"--
