Breakthrough

4 books in series
4.5 out of 5 stars 4,534 ratings

Breakthrough Publisher's Summary

One of the greatest achievements 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.

With the help of a powerful computer system, Alison Shaw and her team are preparing to translate the first two-way conversation with the planet's second smartest species. But the team discovers much more from their dolphins than they ever expected when a secret object is revealed on the ocean floor. One that was never supposed to be found.

Alison was sure she would never trust the military again. However, when an unknown group immediately becomes interested in her work, Alison realizes John Clay may be the only person she can trust. Together they must piece together a dangerous puzzle, and the most frightening piece, is the trembling in Antarctica.

To make matters worse, someone from the inside is trying to stop them. Now time is running out...and our understanding of the world is about to change forever.

©2013 Michael C. Grumley (P)2017 Michael C. Grumley
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  • Book 1

    • Breakthrough

    • By: Michael C. Grumley
    • Narrated by: Scott Brick
    • Length: 10 hrs and 32 mins
    • Unabridged
    • Overall
      4.5 out of 5 stars 2,782
    • Performance
      4.5 out of 5 stars 2,568
    • Story
      4.5 out of 5 stars 2,555

    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.

    • 5 out of 5 stars
    • AMAZING!!!

    • By FocusedOnTheJourney on 07-22-17

    Regular price: $24.95

  • Book 2

    • Leap

    • Breakthrough, Book 2
    • By: Michael C. Grumley
    • Narrated by: Scott Brick
    • Length: 13 hrs and 13 mins
    • Unabridged
    • Overall
      4.5 out of 5 stars 1,085
    • Performance
      4.5 out of 5 stars 1,009
    • Story
      4.5 out of 5 stars 1,007

    It was just one year ago that she and her team of marine biologists had stunned the world with their incredible breakthrough. And now, they were about to do it again. But an ocean away, something strange was unfolding. Along a lonely coast in South America, an experimental Russian submarine, long thought to have been dismantled, has suddenly resurfaced. And the US Navy had taken notice, sending officers John Clay and Steve Caesare to investigate.

    • 5 out of 5 stars
    • Breakthrough continues... excellent sequel!

    • By shelley on 09-10-17

    Regular price: $24.95

  • Book 3

    • Catalyst

    • Breakthrough, Book 3
    • By: Michael C. Grumley
    • Narrated by: Scott Brick
    • Length: 13 hrs and 44 mins
    • Unabridged
    • Overall
      4.5 out of 5 stars 667
    • Performance
      5 out of 5 stars 605
    • Story
      4.5 out of 5 stars 604

    In 1984 a doomsday vault was constructed on a remote island in the Arctic Ocean. Its purpose was to preserve Earth's genetic history in the event of a global catastrophe. Now, decades later, a second vault has been uncovered. This one resting where no one ever expected. And the problem is, it's not ours. Yet even more curious than the vault itself is what lies inside. Seeds. Millions of seeds. Each with a genetic embryo untouched and perfectly preserved. Waiting. No one knows who built it. Or when. 

    • 4 out of 5 stars
    • Sci-fi action and adventure...

    • By shelley on 06-03-18

    Regular price: $24.95

  • Book 4

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