iOS has supported external Bluetooth keyboards for years now. I've even made a couple of small changes to the app in order to better support external keyboards for two people I know are using them.
But with the Smart Keyboard and Apple's apparent intention to pitch the iPad as more of an alternative to a notebook, I decided to add full support for keyboards into Easy Books.
My intention was to see if I could avoid touching the screen completely, and use Easy Books purely in "keyboard mode". I'm pleased to say I managed!
It's possible to launch the app from the iPad Spotlight screen (Cmd + Space), then navigate the app using the arrow keys. The Return key is equivalent to tapping the selected row. More about these and other shortcut keys later.