Enduring Love by Ian McEwanRead about another entry on the list.
After harrowing events surrounding a hot-air balloon accident in which one person is killed, two of the men involved become inextricably and dangerously linked: University professor and writer Joe, engaged to Clarissa, and Jed, who (it just so happens) suffers from a psychotic disorder that causes him to believe Joe is in love with him. Psychoses soon devolve into obsession, stalking, and worse — Jed actually sounds like a not-so-distant cousin of Annie Wilkes. The book was adapted into a little-seen 2004 film starring Daniel Craig and Rhys Ifans.
--Marshal Zeringue