Yep, this is one more plugin which makes bookshelves function as chests. Just right-click bookshelf, and it would be opened as simple chest.
If you click standart Download button, you can be loading not the plugin itself, but it's part for WorldGuard (or any other) compatibility, so check Files and download latest version (older could be not supported by compatibility parts) or simply click one of the following links.
Latest approved version [0.9]
Latest version exists [0.9] (could be not approved by administration if different with previous one, only for developers or risky guys :p)
There's no permissions as soon as i don't see any idea how they can be used.
You can configure size and title of inventory. Size should be a multiple of 9. Changing config.yml affects only new bookshelves. (existing would be have old size, but new title)
This plugin doesn't work with plugins like "chest shops" and any protection plugins.
WorldGuard support: Downlod WGBookshelves.jar (Could be still not approved when you're reading it). It requires both this plugin and WorldGuard, of course. Source code can be found in API Reference page
This plugin it totally open-source, you can get sources on bitbucket repository. https://bitbucket.org/uramer/chestybookshelves/overview
For moderators: It isn't copy of "Bookshelf", because it doesn't require SQLLibrary and does store enchanted items etc.