The 4 star is for the writing quality and level of research not for the contents of the book!!! 

This is one of the most insane non-fiction books I have ever read I would put this up there with Educated in terms of memoir esque books about the Mormon experience in specifically the more side-ways sub communities and the culture that comes from it that makes these things possible. In terms of the true crime part of this the shock I felt in regards to the things that happened would be up there with I Have Life.