Grumley's Beakthrough was a great mix of sci-fi tech thriller and military political suspense with a geology lesson hidden within. I enjoyed it - and I did find myself laughing out loud a few time at the banter. I would have preferred a little more character development on the main character. There was very good CD on the rest of the primary characters, so I was surprised I didn't feel a stronger connection to Clay. That is really the only improvement I would have made. Looking forward to the next one! Cheers ~

Absolutely incredible!!!! I got this to listen to as I drove to Florida. It really made the time fly by!!! I got to the destination with an hour left to listen to and I'm so glad I wasn't still driving for the ending! OMG I would have had to pull over lol it was so gripping I almost couldn't stand it!! The narrator was great too I loved the accent he gave the New Zealand crew lol. Great job all!

I loved this book! It was captivating from the start and kept hooking me with every twist and turn! Thank you for this amazing story and please keep them coming!! Also, perfect narrator pick! Great job!

I really enjoying this book, I was recommended to me, and I whole hardly recommended it to all.

I really enjoyed this book and the suspense created by the author. Looking forward to book number 2!

I normally don’t go for these types of books but decided to give it a go due to the good reviews. I am so glad that I did. This book was EXCELLENT! I was surprised to hear that this was this author’s first book. It was so extremely well done! I will watch for more books by this author. He is very talented and knowledgeable but the book also shows a lot of “humanity”…loved the dolphins!

Lots of fun. Book similar to Clive Cussler and allistair MacLaine.

I enjoyed the book and the narrator was very good.

Great adventure, little sci-fy. Loved it!