I was extremely conflicted about reading this, as I went to high school with these students (though they were younger than me). But it was interesting to revisit the people and places that I knew at the time.
This account is written in a very clear-eyed, journalistic style and appears to be made up of some prior newspaper articles as well as new information and interviews. The case remains unsolved--it is occasionally revisited locally and appears to still be open--so does not really wrap up as continue to explore questions.
Although it has been featured in other articles, television programs, and podcasts over the years, this is a good read for fans of true crime.
I bought this from Amazon and read it very quickly.