Neptune's Wall — Nicholas Harvey

An earthquake in the depths of the Caribbean Sea shakes the little island of Grand Cayman, revealing sinkholes in the roads - and ghosts from the past.When AJ Bailey discovers a long hidden cavern in the reef, she may have found clues to a 34-year-old unsolved police case, but the dangerous dives to unearth the answers, could solve the mystery - or turn AJ into the next victim.A famous 16th century explorer and treasure hunters from the 1980's all collide in AJ Bailey's undersea world on Grand Cayman. Book eight is a mystery adventure with an intriguing plot, a sprinkling of humour, and the action you've come to expect from this thrilling series.Read in series order or as stand-alone books.