I just finished this book and wish there had been more "meat" in it. Of course, the story, which is very interesting, (what kind of person would kill his own teenage children and two of his wives without a shred of remorse?) practically tells itself. The problem is that the author failed to think about the kinds of questions a reader might have. For example, he spends only one paragraph mentioning that Robert Spangler's father died under very suspicious circumstances when his son, who stood to inherit a large amount of money, visited him. I wanted to know more! The author also tends to include too many quotes from newspapers, police reports, etc., but doesn't seem to provide a lot of fresh information. Text is repetitive (for example, stating the location of an FBI lab not once but twice within a few paragraphs), contains grammatical errors, and there is just too much conjecture (also repetitive) on the part of the author. Why wasn't this book more carefully proofread?
All in all, I wasn't left with that satisfied feeling I get after reading Ann Rule, who just states the facts and does a lot of digging to back up any conclusions she makes.