You can of course try your local library shelves, or ask for an interlibrary loan if the book you want isn't there. I've often been frustrated to find out about a book that sounds interesting but it is out of print and not available through the library. Then I discovered abebooks.com. A Canadian company that claims to be the world's largest online bookstore, abebooks.com gives you access to about 50 million books. The system is incredibly efficient. And for new books try your local bookstore or order online:

chapters.indigo.ca