Three at the moment.
Jeremy Cohen, "Living Letters of the Law: Ideas of the Jew in Medieval Society," University of California Press, 1999. On my major field reading list.
Robert Kaplan, "The Arabists: The Romance of an American Elite," Free Press, 1993. I swear it leaped out at me at Borders and said "Read me, read me!"
Neil Gaiman, "Neverwhere." I found the miniseries on VHS on Ebay and HAD to re-read the book.