This was a quick, enjoyable read covering a number of recent (and not-so-recent) astronomical discoveries. It served as a good referesher for some, and an introduction for a few others. The author's premise is that, unlike most science, many astronomical discoveries happen by accident. I agree there's an element of chance or discovery that's greater here than it is elsewhere, but the point really just serves to assemble the author's favorite discoveries in the field. That's OK - I enjoyed reading about them. He does go against his own point a couple times when he discusses some of the large, comprehensive sky surveys. That wasn't an issue for me.