Ian McEwan is mischievous. He ends Enduring Love - a novel about a science writer - with a carefully faked psychiatric study from a non-existent British medical journal. Although the syndrome discussed in the article is real - De Clerambault's Syndrome is the delusional belief that someone else is in love with you - the particulars are all pretend. And yet, when Enduring Love was first released, most critics assumed that the journal article was, in fact, the inspiration for the novel....