James Rollins, born James Paul Czajkowski on August 20, 1961, is an acclaimed American author widely recognized for his action-adventure, thriller, mystery, and techno-thriller novels. Before dedicating his career to writing, Rollins was a veterinarian in Sacramento, California, and continues to volunteer at local shelters.

His works, often praised for their thrilling blend of scientific breakthroughs and historical secrets, have sold over 20 million copies worldwide and have been translated into more than forty languages. Rollins' novels often draw on his experiences as an amateur spelunker and certified scuba diver, frequently setting his stories in captivating underground or underwater locales.

Under the pseudonym James Clemens, he has also penned several fantasy novels, including the popular series The Banned and the Banished. Rollins is notably the #1 New York Times bestselling author of the Sigma Force series and has contributed to various other series and standalone works, such as the movie novelization, Indiana Jones and the Kingdom of the Crystal Skull.

Rollins lives in the Sierra Nevada Mountains with his golden retrievers, Echo and Duncan. His passion for adventure and exploration is reflected in his hobbies, which include scuba diving, spelunking, kayaking, hiking, and traveling.

Beyond his writing, Rollins founded Authors United, a charitable group dedicated to supporting soldiers and their families through efforts like job placement and housing assistance.