Go to www.worldcat.org, and click on the "books" tab.
In the appropriate field, enter keywords or the book's title or author.
Scroll down to review your results. WorldCat will show links to the catalogs of libraries that have the book; how many miles away from you each of those libraries is; Web sites, if any, that sell the book; and the price of the book at each of those Web sites
If you wish only to view or check out the book, follow the library links. Depending on the lending practices of the relevant libraries, you may be able to reserve or check out the book online and perhaps have it mailed or delivered to you.
If you wish to buy the book, follow the bookseller links.