For social sharing you may use ours module:
It allows users on your site post comments through Facebook comments box and share pages, get recommendations and grow visitors on most popular social networking sites, like Facebook, Google+, Twitter and also LinkedIn
Also in BookLibrary added many template positions, you may see them if add to URL "tp=1" parameters.
So you may add ours module to any from these pesitions - with help Joomla module manager. Also you may include to these positions any other Joomla sharing plugins or modules