When you buy books, probably most of the time you buy them at the campus bookstore or off book racks where you often shop. But what if you’re searching for books in a particular subject and can’t find them in the library or local bookstore? There are many online bookstore with excellent selections. Pick a topic that interests you, one that you would like to explore further. Now go online and try each of the following online "bookstores" to find possible books on the subject. Some on line bookstores, such as www.amazon.com, have reader reviews so you can see how other people rank the books.