Amazon Horror Cruise — Eric S. Brown

Dr. Emma Wallace has spent her life searching for the Jewel of Tlayoalli. Accompanied by a group of hired guns, Dr. Wallace will need the help of Captain Richards and the use of his heavily armed riverboat to reach it. Along the way, they'll face all the dangers of the Amazon from giant snakes to unnatural monsters straight out of the darkest legends. Will anyone survive the Amazon Horror Cruise ?