In this instant New York Times bestseller, Cormoran and Robin find themselves ensnared in another winding, wicked case as they must work to uncover the mysterious identity of an online killer—before it’s too late.

When frantic, disheveled Edie Ledwell appears in the office begging to speak to her, private detective Robin Ellacott doesn’t know quite what to make of the situation. The cocreator of a popular cartoon, The Ink Black Heart, Edie is being persecuted by a mysterious online figure who goes by the pseudonym of Anomie. Edie is desperate to uncover Anomie’s true identity.

Robin decides that the agency can’t help with this—and thinks nothing more of it until a few days later, when she reads the shocking news that Edie has been tasered and then murdered in Highgate Cemetery, the location of The Ink Black Heart.