This site was created as search and categorize ISBN numbers with their books titles.
Everybody can find here the book by ISBN number or ISBN number by title. And then you may use it whatever you want: for example find and buy the book in the store or listen to in public library as well.
This is the simplest way to find any book online.
So you should understand that there are no books for download in any format. It's just a catalog of titles and ISBN numbers. Therefore sections of the site does not violate anyone's copyright.
Therefore, there is no reason to worry about copyright infringement.
For any question please write to email@example.com
(c) 2017 All rights are reserved by their owners. All questions please send to e-mail: firstname.lastname@example.org