Book Details Meta Box
Adds author, ISBN, publisher, publication date, page count and a buy link to books, plus a [book_details] shortcode.
Snippet Library
Custom Post Types & Fields snippets for WordPress
Snippets for custom post types, taxonomies and custom fields: register a post type, add meta boxes, show fields in lists and archives. For developers modeling content beyond posts and pages.
Books Post Type With Genres and Authors
Registers a "Books" post type with a Genre category taxonomy and a tag-style Book Author taxonomy, for publishers, libraries and reading lists.
Put the Category in Custom Post Type URLs
Builds custom post type URLs with a taxonomy term, such as /books/fantasy/the-hobbit/, which reads better and groups content by section.