Google Books is one of the many Google applications now available in BishopApps.
You can search for any text, browse by genre or author, and you can filter search results any which way you can imagine, including searching only public domain books or only previewed books. Books in the public domain are available in “full view” and free for download. Books that Google doesn’t have copyright permission to share are previewed, with only a limited number of pages or lines able to be viewed.
Books are viewed in Google’s PDF viewer with its interface features, including links to sites where you can download if it is copyright reserved or download it if it’s public domain. You can also download in eReader format for various devices.