The Edge of Darkness by Bob Phillips, Tim Lahaye (2006, Hardcover)

First, let me say that if you haven't read the 3 books preceeding this 4th one in the series, than I strongly recommend you go back and read them. Each book does a fantastic job of building on the previous one and it is a fast paced and exciting story.
Michael Murphy is a great lead character and is supported by equally as great characters. Several questions are answered in this volume, while several more are left unresolved and unanswered. I am eagerly awaiting the next "episode" in this story. It is an exciting and exhilarating read.
If you are interested at all in the end of times, or even in archeological events, this is the book for you. Indiana Jones, watch out!!!