Google Book/Magazine API integration for fetching the information for google books and magazines and book shelves also filter them. You can eaisly get most of the elements for a particular book and magazine or the books of a book shelf from the google book search. like :-(title,sub title,preview link,authors,publisher,publish date,buylink,downloadlink,version,ISBN information,ratings,...many more..Also you can get the google checkout link for that book/magazine
Gemfile gem 'google_book', '~> 0.3.18'
install gem install google_book