James Rollins is the pen name of American veterinarian James Paul Czajkowski, a writer of best-selling, action-adventure, thriller novels. He gave up his veterinary practice in Sacramento, California, to be a full-time author.
Rollins is an amateur spelunker and a certified scuba diver. These pastimes have helped him to provide content for some of his earlier novels, which are often set in underground or underwater locations.
Under the nom de plume James Clemens, he has also has published fantasy novels, including Wit'ch Fire, Wit'ch Storm, Wit'ch War, Wit'ch Gate, Wit'ch Star, Shadowfall, and Hinterland