One of The Wall Street Journal's Ten Best Mysteries of the Year"Amazing...This is a series for the ages, it's so spectacular.”—Gillian Flynn, #1 New York Times bestselling author of Gone Girl

1846: In New York City, slave catching isn't just legal—it's law enforcement.

Six months after the formation of the NYPD, its most reluctant and talented officer, Timothy Wilde, learns of the gruesome underworld of lies and corruption ruled by the "blackbirders,” who snatch free Northerners of color from their homes, masquerade them as slaves, and sell them South to toil as plantation property.

When the beautiful and terrified Lucy Adams staggers into Timothy's office to report a robbery and is asked what was stolen, her reply is, "My family.” Their search for her mixed-race sister and son will plunge Timothy and his feral brother, Valentine, into a world where police are complicit and politics savage, and where corpses appear in the most shocking of places...