I rated this one closer to a 4 than 3 1/2 stars but not by much. It is hard to discuss it without creating many spoilers except it deals with a group of criminals that kind of "trap" a young man plagued by gambling debts into helping them steal a deadly virus. Throughout the story a big snowstorm slows down any investigation as well as the criminals' getaway.
I had several problems with the story that kept me from giving it higher marks. Being in the computer security field, I find it highly implausable how the security controls are bypassed so easily to get into the lab where the virus is stored. Also, right from the start the main character (Tony Gallo) is headed to be the love of her boss who is about 25 years her senior. Their relationship made me very uncomfortable.
The book does have a lot of tension and most of the times the only thing protecting the people involved is the bumbling of the criminals. There are some decent supporting characters and it is interesting to see how different police work is in rural Scotland from what we are used to.