The preface asserts "no thoughtful reader ought to come away from a serious perusal of this book without a substantial increase in the comprehension of what suicide is, and by extension, how suicides might be prevented." Unfortunately, my serious perusal did not produce that result. He gives a cursory description of 13 books on suicide and includes a brief excerpt from each book. This methodology does not provide a "substantial increase" in knowledge, unless you knew absolutely nothing about suicide before reading this book.
I was disappointed by the hype. The best thing I could say is that it gives the table of contents for each book, so you could see if you want to read more of what he has not included, and the excerpts give you at least a slight view of the author's style. But really these are just snapshots of each book and there's nothing substantial here...