From Chris Meadows on TeleRead:
When you go to the library for a book to read, I’ll bet the notion that it might carry germs never even crosses your mind. But the truth is, any object that people touch picks up germs—especially objects that lots of people touch. That’s why supermarkets these days have sanitary wipe dispensers with the shopping carts. And the thing about library books—especially popular library books—is that they end up getting touched by lots of people.
That’s what a post on Mental Floss points out, looking at the history of research into “library book grossness.” It includes mention of experiments in which guinea pigs were injected with a solution extracted from the pages of dirty library books, and promptly ended up dying of tuberculosis, strep infections, and other nasty diseases.
The bright side is, you’d effectively have to have a scientist extract the germs and inject them into you for there to be any actual risk of infection from an unsanitary library book. The Wall Street Journal notes that germs need a “critical mass” to infect people, and there just aren’t enough of them on the average book to do the trick. However, some libraries have had issues with bedbugs. A pesticide specialist recommends that if your library has had an infestation, you could carry your books home in a cloth bag and run them through the dryer for 30 minutes to kill any resident bugs. (But I can’t imagine that being tumbled around in a dryer for 30 minutes would be very good for the books, either!)
Link to the rest at TeleRead