Google has released an update for its iOS Play Books app, bringing a number of new features to the iBooks rival. The key update here is annotation and bookmarking: users can now bookmark pages simply by tapping the top-right corner of the screen, as well as highlight, annotate, and translate text they've selected. You can now also check the definition of a word as you read, or look up difficult terms with Wikipedia or Google. It's also notable that most of these features aren't available on the Android App.

Google has also made a couple of changes to the way Play Books looks, including the addition of a +1 button for sharing what you're reading on Google+, as well as the addition of an option that allows iPhone and iPod touch users to choose either a grid or list layout to browse through their books. The updated app is available now in the iTunes App Store.