I am leery of those books, and others. But I'm a classical/CM educator, so I probably have a bit of book snobbery about it.
I remember in high school everyone was reading ghost stories and they really did have an addictive quality to them. The benefits of reading -- for knowledge, seeing the world from another person's perspective, broadening the mind -- can be obscured when a person comes to expect an emotional thrill from a sensationalistic story. It's like getting addicted to the exciting flavor of Cheese Doritos, Snickers bars and the burn of a Coke -- until healthy food loses its appeal.