A friend, wanting books to buy for Christmas, asked me for a list of 15—20. Well, here are 18 of my favorites. N.B.: I limited myself to one book per author (otherwise it would be all Murray!). Of course, I ignore a vast number of important works, many of which I love. But any of these 18 will enlighten and inform, and can change a life. May they do so. Merry Christmas!