Google Scholar allows you to search broadly for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites.
Get information about using Google Scholar here.
Google Books search works just like web search. Try a search on Google Books or on Google.com.
If the book is out of copyright, or the publisher has given Google permission, you'll be able to see a preview of the book, and in some cases the entire text. If it's in the public domain, you may download a PDF copy.
