I have been teaching evolution to college students for thirty years. Until recently, I seldom spent much time arguing that evolution happens. I took that for granted and launched directly into my real love--the mechanisms of evolution. This has lately begun to look like a mistake. According to polling data, most Americans doubt that evolution is a real phenomenon. How can one teach students how evolution works if they doubt that it happens at all?
As soon as this dawned on me, I began looking for a text on evidence--something to assign during the first couple of weeks of my introductory course. Many of the books I found seemed to assume that the reader needed only to be told about evolution, not convinced.
In the end I wrote my own book, which covers the evidence for evolution and nothing more. It does not merely summarize received wisdom; it recounts the give and take between skeptical scientists who first asked "how can we be sure" and then answered those questions with evidence.