[quote parentalhelpline]@2Olives1Onion
I've just noticed that this book has arrived in the library at my DC's school. I was wondering what age group you would think the content was appropriate for?[/quote]
Looking at a few pages - I'd say no - categorically not suitable for school children. The MC article gives a content warning of domestic violence and substance abuse 
an excerpt
"You're getting a lot more candor out of me than I'm used to," her cowboy said, sounding surprised at himself, even as he squeezed Reese's tits. "The power of pussy, I guess." "You might get my pussy," she responded, enjoying herself and aping his cowboy drawl, "but a good woman'll flay your soul."
Reese was twenty-six the first time a man hit her—as a man will sometimes hit a woman: not to injure her, necessarily, but to show her something. The blow, an open-handed hook, caught her as she opened her mouth to insult him. She hadn’t seen his hand coming. Her head jerked back. Her vision wavered. Surprise turned to pain, which in turn surprised her with its force. “Really?” she asked quietly.
He coiled his muscles tight again, as if to show her that yes, really. If she had it all to do over, she would have spat at him. But her body, which did not like pain, betrayed her, and without thinking, she flinched and blurted out, “I’m sorry.” Satisfied, his shoulders dropped.
Copper trickled thinly from a split lip into the cracks between her teeth. She probed the edges of the cut with her tongue, while her hands hung motionless at her sides, the stillness of an animal turned statue before a predator.
www.marieclaire.com/culture/a35289731/detransition-baby-torrey-peters-excerpt/