I picked up 'The Greatest Show on Earth' after seeing it mentioned in five different threads, and it genuinely clicked in a way other books hadn't. Dawkins avoids the dry textbook tone and frames evolution as this massive, observable spectacle. He uses domestic dog breeding as a starter example, which is brilliant because you can literally see the variation outside your window. It doesn't just list evidence; it builds a case, piece by piece.
Some folks argue his style is too confrontational towards creationism, which might distract if you just want pure biology. I get that, but for me, that framing actually highlighted why the evidence matters so much. The chapter on the fossil record, especially the 'molecular clock' stuff, finally made sense of how we date these ancient changes. I finished it feeling like I could explain the core concepts to someone else, which is the real test.