This is the only book in the Sigma Force series that I have read, so perhaps by reading these books in order I would have a different opinion. I was disappointed in the lack of character development of the main characters, Mr.Rollins seemed to rely on stereotypes... The hero was always distracted by any pretty girl he'd see. There were also too many secret entities-- Sigma "the good guys" and not only the one villain unleashing his genetically modified corn on the world, but a whole secret cabal of villians, then a third "Club of Rome". There were teams of "good guys" in several places across the globe all at the same time, again taking effort on the part of the reader to keep everyone straight.
There were grains of interest in his choice of using mysterious passages in the Doomsday Book, but the "key" was a let down.
The book itself is interesting and well-paced; but the narrator - who is fine during straight narrative - should STOP trying to do accents. There are several foreign characters and the wide range of uniformly poorly done accents takes away from an otherwise good story.
I was very excited to see that James Rollins had returned with another Sigma Force novel. If you liked Black Order and the Judas Strain (Excellent listen), you will enjoy the Doomsday Key. James Rollins is always bridging the gap between fact and fiction, and if you do the research after (while) listening to his books, you will be surprised by how much of it is factual.
I was not very pleased with this books ending. I thought Rollins could have done more. He builds up the climax of the story very well, but he does not conclude it with a bang. Nonetheless, if you like international espionage, this is definitely an enjoyable listen.
Peter Jay Fernandez did a good job with the narration.
As a huge fan of James Rollins, I knew this would be a great book. I was wrong, it was FANTASTIC!! I never get bored with the action, locations and history in each book. A MUST read!!