"She needed something more noticeable. But I couldn't think of anything. Which is not to say that I didn't have any distinguishing characteristics. I owned a signed copy of Miles Davis's Sketches of Spain. I had a slow resting pulse rate: forty-seven normally, and no higher than seventy with a high fever. I was out of work. I knew the names of all the brothers Karamazov. But none of these distinguishing characteristics was external."
The Times has the book's first chapter online, as well as lots of other material on and by the author.