Google Books
Google Books (previously known as
Google Book Search and
Google Print) is a service from
Google Inc. that searches the full text of books and magazines that Google has scanned, converted to text using
optical character recognition (OCR), and stored in its digital database.
[1]
Books are provided either by publishers and authors, through the Google
Books Partner Program, or by Google's library partners, through the
Library Project.
[2] Additionally, Google has partnered with a number of magazine publishers to digitize their archives.
[3][4]
please visit the link for more details
https://en.wikipedia.org/wiki/Google_Books