Im Promoting an upcoming book that I might be in because I entered a contest, the books title is Meg: Hells Aquarium.
This book is book four in the series and is likely the end of the series. It was written by Steve Alten.
The First book is called "Meg: A Novel of Deep Terror" it follows the journey of Jonas Taylor who in the past saw something that frightened him so bad he made a mistake which caused the death of some scientist, he went on to become a paleontologist to prove that this creature still existed, an old friend asks for his help to go back down the Trench to fix some machines where he encounters an old foe.
The Second book is called "The Trench" it follows Jonas Taylor 4 years after the events of Meg, In this one Jonas must once again go back down the trench to save his wife from a mad man, a meg and 3 new creatures that are more vicious then the Meg was.
The Third book is called "Meg: Primal Water" it follows Jonas Taylor 18 years after the events of The Trench and now Jonas is strugling with life, so he is forced to join a new reality show called Daredevils, but an old foe is working in the background to manipulate the game to get revenge on Jonas for what he did long ago.
I hope these small summaries will interest you into reading the books.
Thanks csmokey