On the back of my father’s copy of Good Omens was this photo. I read it in the mid-nineties and remember thinking how perfect it was for the book, how hilariously rock star they looked, and how I needed to grow Pratchett’s beard someday. Neil Gaiman wrote this about it: It was taken in Kensal Green Cemetery in February. Terry borrowed the white jacket from our editor, Malcolm Edwards, and grumbled that it did nothing to keep him warm on a very cold day. “Sometimes you have to be cold to look cool,” I told him. “It’s all right for you,” he said. “You’re wearing a leather jacket.” “You could…