As the Gristmans help build the first church in a remote area of the Amazon rainforest in Peru, they make amazing discoveries and see unparalleled beauty. But hidden dangers await them in the jungle. In Danger River, Caleb and Anna confront their fears—and their prejudices—as they brave the dangers of sharp-toothed piranhas, bloodthirsty caimans, and treacherous quicksand. They also deal with frustrating—and sometimes hilarious—bathroom issues. But they see wonderful answers to prayer while learning important lessons and making new friends. Join the duo on their most thrilling missionary adventure yet as they face unexpected dangers along a tributary of the mighty Amazon River.