What are some alternatives?
When comparing BookAuthority and World Happiness Map, you can also consider the following products
Goodreads - See what your friends are reading.
appenguin - Turn the most complex web application or website to into an Android app in minutes, for free!
Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.
Microsoft OneDrive - Secure access, sharing & file storage
LibraryThing - A home for your books.
GroupDocs - GroupDocs is a web-based service for online document sharing, collaboration and management.