Looking for fiction to help my mom

I hope this isn’t considered tmi or inappropriate for this sub.

Need helping picking out a book for my mom. She just had her second divorce, this time with a manipulative and abusive narcissist. It’s been a little over a year and she is starting to slightly get her focus back. I just feel like the right book would do wonders.

She hasn’t read much; Harry Potter and Magic Treehouse because she read with us when we were younger. When she tries to read today she kinda just gets a few pages in and stops.

I personally don’t have lots of faith in self help books and think the right fiction novel does what self help tries to do but better. Also, I don’t think a book where the main character is in a relationship would be the best idea ever.

TLDR:
~<300 page book
Fiction
Easier to read
No major romantic themes
Enpowering / healing trauma