Beleaguered bookseller Waterstone’s is counting on aNobii, a book-oriented social networking site originally developed in Hong Kong, to help save them. By Roger Tagholm LONDON: Troubled UK chain Waterstone’s is pinning its hopes on the aNobii app which it officially launches next month. Not much has been said about this so-called “social bookselling” website, but it was clear from talking to …