Overall, I quite enjoyed this book.
It is, at it's core, a discussion of ethics that just happens to use the Batman mythos as its source material. The author, a university professor, does a decent job of balancing academic rigor and a hardcore fan's love of Batman. He manages to be sympathetic to the character, without overlooking the many flaws. The style can be a bit dry at times (he is an academic!) but very readable overall.
Speaking as an older fan who has read Batman comics for many decades, the book gave me a greater appreciation for, and admiration of, the comic's many writers.
On the other hand, as much as I enjoy a good exploration of the dark side I sorely miss the days when Batman was called "the world's greatest detective". "Batman and Ethics" focuses on these dark explorations of soul, and in doing so made me think about larger issues.
The book has extensive notes for each chapter that include references to the source material (ie. the specific issue where a point of discussion was mentioned), an extensive list of references, a good index, and a list of the comic writers and artists.