Londoners, if for whatever conceivable reason you need a book on your front doorstep within the next hour, there’s an app for that.  NearSt is a new London-based app that offers a selection of books from nearly forty local bookstores that can be browsed, ordered, and delivered straight to you via bicycle courier. However, the app must still compete with Amazon’s Prime Now service, which will deliver anything (including books) within the hour at dirt-cheap rates.