When reading iBooks using the Apple iPad, particularly if you are using the new iBooks Author application, it may not be immediately obvious how to navigate from an open book back to the library.

To navigate back to the Library you need to tap the open book just once which brings up a menu bar at the top of the screen with buttons for Library, Book Navigation, Notes, Screen Brightness, Zooming and Bookmarking.

You can also double-tap a particular word to highlight, define or copy a word or phrase and you can also attach notes and search for further occurrences of the phrase.