When does Sigma Force return?

James Paul Czajkowski is an American veterinarian and writer of action-adventure novels. Under the pen name James Rollins, he has also published fantasy novels, such as Wit'ch Fire, Wit’ch Storm and Wit”ch War. Rollins gave up his veterinary practice in Sacramento, California, to be a full-time author. Rollins was inspired by Howard Carter's discovery of Tutankhamun.