Twitter just loves wordy hashtag games and the latest is of a literary bent: #bookswithalettermissing has been trending as tweeters gleefully delete one letter from famous titles to conjure up different works altogether. Hence the likes of The Princess Brie, Loud Atlas, Laughterhouse-Five, A Christmas Carl and The Lion, the Itch and the Wardrobe. It's hard to resist coming up with one's own: Madame Ovary, The World According to Gap or A Brief History of Tim, anyone? One tweeter, the mysterious @darth, duly picked up the ball and ran with it, responding to suggestions by designing actual book jackets. Here are some of our favourites…