Barnes & Noble has taken a leaf out of Amazon's book, launching a range of book-based apps to run alongside its hardware in the UK.As you might recall, the company introduced the Nook HD and HD+ tablets to the UK back in September, alongside its E-Ink readers for purely literary pursuits. If you've been tempted by any of them and have Android or iOS hardware too, the apps could be just what you need. If you haven't got a Nook, it still might appeal as a standalone reader if you don't fancy going down the Amazon route for your e-books.Like the Kindle apps, you can buy, download and read books on the go, change the font size, turn pages with the flick of a finger, sideload documents and access some free books that come with the app. Not just books, you can also get magazine content via the apps too.If you do have one of the Nook devices, it also allows you to sync your reading from that handheld to your phone or tablet, syncing so you can pick up where you left off. Always nice.In the UK, apps for the iPhone, iPad and Android devices are available, all free of course. The money for Barnes & Noble is in the books you will inevitably download. Because you will, trust us.