The Annual Bibliography of English Language and Literature contains 880,000 records, covering monographs, periodical articles, critical editions of literary works, book reviews and collections of essays published anywhere in the world from 1920 onwards.
In-print, out-of-print, and forthcoming books, audios, and videos from North American publishers, distributors and wholesalers. Full-text book reviews from sources including Choice, Kirkus, Library Journal, Publishers Weekly, and School Library Journal.
Search for books the same way you search google for other information. You'll find a list of relevant hits. If the book is out of copyright, or the publisher has given 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're free to download a PDF cop.