A review by lizella
The Doomsday Key: A SIGMA Force Novel by James Rollins

4.0

The Doomsday Key is a great international spy thriller underpinned with factual history and current issues that make the story come alive. In addition to making me want to read the rest of the books in the series, Rollins includes additional sources for those interested in learning more about the history he's incorporated into the book.