Andrew Mayne is the Wall Street Journal bestselling author of The Naturalist, Looking Glass, Murder Theory, Dark Pattern, and Angel Killer, as well as an Edgar Award nominee for Black Fall in his Jessica Blackwood series. Sea Castle is the fourth book in his Underwater Investigation Unit series, following Sea Storm, Black Coral, and The Girl Beneath the Sea. The star of Discovery Channel's Shark Week special Andrew Mayne: Ghost Diver and A&E's Don't Trust Andrew Mayne, he currently works on creative applications for artificial intelligence as the science communicator for OpenAI.