This book contains 2 deep sea mystery thrillers. Mystery in The Deep Sea: Not long after a young couple is attacked and killed by a mysterious predator in the ocean, an exploration crew goes to investigate some strange findings in the deep sea. What they discover is shocking, and the mission soon turns into a fight for survival. Fatal Submergence: Cole, Ryan, and Troy go cruising on a boat, only to find themselves abducted and held hostage by a group of armed criminals on a ship. After they head further out into the ocean, they begin to realize that the abduction is actually the least of their problems.