Tomb of Atlantis

There are 6 books in the Atlantis series: Hidden Courage; Tomb of Atlantis; Curse of Atlantis; Tomb of Zeus; Atlantis: The Crystal Scepter; and Atlantis: The Sacred Orb (release on December 14th, 2014). Please see recommended order of reading below.

Hidden Courage: is the back story of the main character in the Atlantis series (Interesting, but not essential)
Tomb of Atlantis: is book 1
Curse of Atlantis: is book 2
Tomb of Zeus: is book 3
Weapons of Atlantis: is book 4
Atlantis: The Sacred Orb: is book 5

Tomb of Atlantis:
Young Jack Roberts is an adventurer. While flying up through the Caribbean many years ago, he spotted what he believed was a golden artifact resting on the ocean's floor. Without the resources to investigate further, he snapped some photos and flew home.
Years later, he makes a startling discovery. While watching an interview on TV, he sees an exact duplicate of the symbol he photographed now displayed on a set of ancient tablets reported to be 7,000 years old. With his curiosity piqued, he knows he must return.
Jack's new adventure leads him back to the Caribbean Sea in search of the golden artifact. While diving, he finds other ancient relics that point to the first real evidence of Atlantis. Excited and energized, he returns to the dive zone once more.
Tragedy strikes and Jack is now forced to fight for his life. Violent storms and vicious predators force him beyond even his own endurance as he clings to an improvised raft, driven not just to survive, but to solve the 7,000-year-old mystery of Atlantis.

82,000 words