The main part of this content box is a visual image of your bookshelf:

You can have multiple bookshelves within Connections, and you can choose which one to display using the “On bookshelf” drop-down. There are additional links to sort by author or title (ascending/descending), and arrows at each end of the bookshelf image for scrolling.

You can also pick a letter at which to start viewing the bookshelf - it will then display not only the books with author/title starting with that letter, but also all preceding/following letters (depending on if you've displayed the bookshelf in ascending or descending order).

Below your bookshelf display are links to actions for managing your bookshelves - see more information on managing items and bookshelves.