Forerunners of Darwin
This book was published nearly 50 years ago and some of the essays were written nearly a century ago, so it won't give you the latest thoughts on evolution, and it isn't particularly easy to read. But as a historical work it does have the benefit of being closer to the arguments which are written about. It also shows that objections to Darwinism weren't just on religious principles, which it's all to easy to believe today. If you want to know about the details of the arguments about evolution which took place before and during Darwin's lifetime then you'll find plenty of interest in this book.