Sigma Force The Doomsday Key, Book 6, (Paperback)

from burnit99

A somewhat guilty pleasure of an adventure/suspense novel, with the Sigma Force crew trying to prevent a biological apocalypse from an ancient plague which dark forces are trying to bring back. It feels like I've read several books with this theme, but it has the virtue of being a fast read, fast...

from MSWallack

The Doomsday Key was better than the last few Sigma Force novels becuase it relied more on science (even if perhaps fantastic science) and less on the supernatural. My disbelief didn't need to be suspended quite as much. The biggest drawback to these Sigma Force novels is that two of the protagon...

from ahduval

This is the first and only book of this series that I have read, therefore plopping me in the middle of some ongoing plots. The main characters work for a secret U.S. Intelligence/Military organization called Sigma Force. The bad guys work for a secret evil military/terrorist organization known a...

from dketelsen

I enjoy the way that Rollins writes but I find the entire Sigma Force versus The Guild annoying. It reminds me of the old TV show Get Smart. Having two agencies fighting each other tooth and nail yet being totally secret and unknown to the general population is fine when played for comedy, but it...

from utbw42

Best Rollins yet (haven't read his latest one). Great story, and the characters finally have begun to really develop and set up for future novels in the Sigma Force series. I especially like the love/hate relationship between Pierce and Seichan, mortal enemies but seem to need each other in weird...