James Rollins, born James Paul Czajkowski on August 20, 1961, is a renowned American author known for his work in the genres of action-adventure, thriller, mystery, and techno-thriller novels. Before becoming a full-time writer, Rollins was a veterinarian with a practice in Sacramento, California. His knowledge and experience as a veterinarian, amateur spelunker, and certified scuba diver have significantly influenced his writing, with many of his novels set in underground or underwater settings.

Writing under the pen name James Clemens, Rollins has also published several fantasy novels, including the celebrated series The Banned and the Banished.

Rollins is the #1 New York Times bestselling author with his books translated into more than forty languages and selling over 20 million copies. His work is characterized by its adventurous spirit, scientific exploration, and historical intrigue, often drawing comparisons to authors like Michael Crichton and Dan Brown.

His most notable series, the Sigma Force, includes titles such as Sandstorm, Map of Bones, Black Order, and many more. He has also written standalone thrillers, a movie novelization, and series for younger audiences.

James Rollins is also the founder of Authors United, a charitable group dedicated to aiding military families. In his personal life, Rollins resides in the Sierra Nevada Mountains with his golden retrievers, Echo and Duncan, while enjoying activities like scuba diving, spelunking, and traveling.