I found it overly dramatic and all around the place, trying to cover a huge number of events - from Camp David Accord to Yitzhak Rabin's assassination. While this paints a somewhat broader picture, a lot of that material is not that relevant to the main topic of the book. In my opinion, this book is at least twice as long as it should have been.
Furthermore, the Author repeatedly attempts to present Ayyash as a super-villain, which might be somewhat of an exaggeration. In the pecking order of Hamas & IJ murderers, Ayyash was hardly the most important or the most bloody.
Overall, it's not a bad book - probably the only one on this topic. If you are interested in the subject, definitely read it.
Verdict: OK, read once.