There are many high-quality books explaining why evolution is beyond any serious dispute—so many, in fact, that reading through them has become mundane for me; these days, I find it difficult to get excited about many of them, even while recognizing their merit intellectually.
Jerry Coyne's Why Evolution is True had me at the edge of my seat.
Coyne's book is the most masterful treatment of the evidence for evolution, and associated fatal problems for creationism, I have ever read. I cannot imagine anyone coming away from it unconvinced, except for one who has already made up his or her mind in advance. This book is now number one on my list, with a bullet.