National Center for Biotechnology Information
NCBI Bookshelf provides free access to books, reports, articles and databases from the books division of the National Library of Medicine Literature Archive.
Question: Why would you use Google Book Search?
Answer: Google Book Search searches the full-text of the books in its inventory. Library Search and WorldCAT are limited to searching only title, author, subject heading and other specific and limited information about a book.
Because Google Book Search lets you search within books, you can see a table of contents or an index or just a portion of a book. You can then locate the book in a nearby library.