home library

Why are so many cookbooks devoted to the humble potato?
If one were to survey a very large and random group of book collectors, I strongly suspect that not a single one of them would fess up to collecting
Libraries and bookshops have always been great places for people watching.  
Have you actually read all the books in your personal library?  90% of them?  50%? Have you read any of them?
Why do you collect the books you collect?