Breakthrough Series by Michael C. Grumley

4.04 · 55 ratings
  • Breakthrough (Breakthrough #1)

    Breakthrough (Breakthrough #1)

    Michael C. Grumley

    · 29 ratings · published 2013

    ONE OF THE GREATEST BREAKTHROUGHS IN HUMAN HISTORY. A SECRET THAT WAS NEVER SUPPOSED TO BE FOUND. AND A CRISIS THAT CANNOT BE STOPPED.Deep in the Caribbean Sea, a nuclear submarine is forced to suddenly abort its mission under mysterious circumstances. Strange facts begin to emerge that lead naval investigator, John Clay, to a small group of marine biologists who are quietly on the verge of making history... more

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  • Leap (Breakthrough #2)

    Leap (Breakthrough #2)

    Michael C. Grumley

    · 26 ratings · published 2014

    ONE OF MANKIND'S GREATEST LEGENDS HAS BEEN DISCOVERED... A FIND THAT ANY COUNTRY IN THE WORLD WOULD KILL TO POSSESS... ...AND IT'S ABOUT TO CHANGE EVERYTHING. One year ago, a remarkable breakthrough changed what it means to be human. Now, from a new research center in Puerto Rico, Alison Shaw and her team are about to stun the world...again. At the same time, less than a thousand miles away, a mysterious vessel is spotted off the quiet coast of Guyana... more

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