Here is another neat plugin for sites that cover a lot of books. The GS Books Showcase plugin lets you display cover, author, reviews, ratings, other essential information about each book. You can show books on your site anywhere with widgets and shortcodes.
You can add an unlimited number of books to this plugin. The pro version of this plugin has a bunch of attractive themes. You can limit the number of books and characters to display. The pro version also allows more fields. It supports up to 4 columns. You can apply your own custom CSS rules to further customize your books.