Not what I expected! My bad, I judged a book by its cover. The first and last chapter were ok but, wow. I didn't want to hear another word about Pi! This was more about math and other sciences and less about bio-safety level 4. Read the full description before you buy!
The book does not match the title. This is not the same kind of story as The Demon in the Freezer or The Hot Zone. It should be called other generally interesting stuff written by Richard Preston in his narrative style. That said, as a science geek I enjoyed the book, but if you are looking for more scary virus stuff based on some of his other writings this may not be exactly what you want.