One of the sounds of summer at my house is a rumbling in the skies. No, not thunder. Thunder is rare around here. I live about a mile from an air force base, and every July means the air show. I’ve attended a couple of times, but usually I just go outside on my deck to watch the jets tear across the sky in close formation. They’re moving so fast, I see them before I hear them. By the time the sound arrives, they’re moving out of sight. As I stand there on the second story deck waiting for the jets to appear, it's interesting to watch the people enjoying a summer Saturday. One neighbor mows her lawn, another unpacks after a fishing trip. A couple walks their dog, and a boy rides by on a bicycle. As the roar of the jets dies away, I can hear the children giggling at the playground in the park. It reminds me of books I’ve enjoyed. There are the thrillers, like the Da Vinci Code. Just as I’m in awe of the skill of the pilots to fly in formation at almost the speed of soun