Brief and pocket-sized, this is less of a book and more of a booklet--interspersed with black and white images, quotes, and the occasional Bible verse to break up the formatting and (hopefully) hold the attention of even young readers.
Note:My 14-year-old found this in the grocery store and asked if she could have it. (She's never asked for a book before--if that tells you anything about how things are going in middle school.) So I told her yes, of course. I then decided I should read it myself, so I'd know the talking points...
I'd never heard of Dr. Jantz, despite his apparent contributions to Psychology Today. His prose is above-par--informative without being too droning or dry, conversational and accessible enough to engage effectively with readers as young as Middle-Grade, and graciously faith-inclusive without beating readers over the head with it. He defines terms, supplies a wide range of categories, offers brief but poignant examples, touches on possible causations... and finally, gives succinct guidelines for approaching confrontation and defense of one's boundaries.
I appreciated that he extends grace enough to give possible reasons and influences affecting the 'why' of toxic behaviors (stressing the 'why' is not actually as important as the question of 'what now'), and encourages readers to try to separate the behavior from the person. But at the same time, he's stern about addressing physical and psychological abuse, urging readers not to accept or tolerate either.
For a Christian-influenced book, I was expecting some mention of spiritual warfare... but in its brevity, or perhaps simply due to author preference, that aspect is omitted.