Two fearless investigators unite to stop a media-savvy serial killer from carrying out a cataclysmic crime for all the world to see in a riveting thriller by a Wall Street Journal bestselling author.

The FBI calls on former agent Jessica Blackwood to look at a puzzling crime. A wildlife officer has found the body of a popular YouTuber encased in an obelisk made of salt in a remote refuge. When the agency is tipped off to a second body, that of a TikTok star chained to the bottom of Nevada’s Pyramid Lake—her hands clasped in prayer—Jessica recruits a trusted colleague of her own: Floridian underwater investigator Sloan McPherson.

It appears to be the work of a ritualistic serial killer preying on influencers. That tracks when a third victim—a fantasy-game live streamer—barely survives a pipe bomb attack. But in navigating the social media world of instafame, manipulation, and deception, Jessica and Sloan know how illusory appearances can be. As the threats multiply across the country, they fear they’re playing with something more extreme than they imagined: a killer’s endgame that could be nothing less than apocalyptic.

Andrew Mayne is the Amazon Charts and Wall Street Journal bestselling author of The Girl Beneath the Sea, Black Coral, Sea Storm, Sea Castle, and Dark Dive in his Underwater Investigation Unit series; The Final Equinox and Mastermind in the Theo Cray and Jessica Blackwood series; The Naturalist, Looking Glass, Murder Theory, and Dark Pattern in the Theo Cray series; Angel Killer, Name of the Devil, and the Edgar Award–nominated Black Fall in his Jessica Blackwood series; and Mr. Whisper in the Specialists series. He was the star of A&E’s Don’t Trust Andrew Mayne and swam with great white sharks using an underwater stealth suit he designed for the Shark Week special Andrew Mayne: Ghost Diver. He worked on creative applications for artificial intelligence and served as the science communicator for OpenAI, the creators of ChatGPT. He now serves as CEO of Interdimensional.ai. For more information, visit www.andrewmayne.com or find him @AndrewMayne.