John Rourke is a fictional character from the Survivalist series of novels written by Jerry Ahern. He is depicted as a skilled survivalist and former CIA operative who navigates a post-apocalyptic world. Rourke is known for his resourcefulness, combat skills, and ability to adapt to challenging situations. Throughout the series, Rourke faces various threats, including hostile groups and environmental dangers. His character embodies themes of resilience and self-reliance, making him a central figure in the narrative. The series explores his relationships with family and friends as they strive to survive in a drastically changed society.