John McKinna, before his untimely death in 2016, was an underwater technical supervisor and operations manager, responsible for overseeing upkeep of the main structure and support systems of the Key Largo Undersea Park, home of Jules' Undersea Lodge. A former offshore commercial diver, he was also a musician and an internationally known novelist. He was an avid free-diver and cruising sailor.
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Hold your breath … He’s braved the darkest waters … but now he’s way out of his depth. Ben Gannon is the best deep-sea recovery expert in the business. No salvage is too deep, no job too risky. But when Ben and his crew find several bodies�... SEE MORE