Not only is this book a sequel to 'The Loch', it is also a prequel to the upcoming 'Meg 5: NightStalkers' novel. . .
Taking place two years after The Loch, 'Vostok' follows the adventures of Marine Biologist Zachary Wallace (and later Jonas Taylor, from the 'Meg' series of novels) as they explore Vostok - a 6,000 square-mile lake, over 1,000 feet deep, and two-and-a-half miles below an ice cap!
I LOVED the 1st half of this book! Absolutely fantastic! A fun, nail-biting adventure.
Then, the book suddenly jumps ahead, seven years later, and shifts in a completely different direction.
I am not saying that the latter half isn't good, it's just different. The book, as a whole, is a great read, I just enjoyed the first half more than the second.
It will be interesting to see how this book will tie into 'Meg 5'. (I have only read 'Meg' and 'Meg: Origins' so I need to get on the ball and read the others, before Meg 5 comes out this summer...)