It was originally published in 1970, and later re-released in 2006 as part of the Hard Case Crime series.

[1] Hard Case Crime republished the novel under Crichton's name on October 29, 2013.

[2] The Chicago Tribune called it "fairly thrilling at times.

"[3] Diver James McGregor is used to exploring sunken ships.

In one of the most beautiful places on Earth, a sinister plot is about to unfold.