You wake up at 3am, in a cold sweat. ‘What’s wrong?’ asks your partner/dog/cat. ‘I just had a nightmare… that Chris Carra guy hasn’t had a book published for a while.’ ‘Don’t worry’, he/she/dog/cat replies. ‘His fourth book, The Bluffer’s Guide to Fitness, is out now! Please go back to sleep, this is getting weird…’…