Part-memoir and part-self help. The memoir/personal stories provided by the author didn't work for me, and I found myself unable to relate to her. So I found those parts distracting at best.  YMMV.

The self help is a pared down version of Kristen Neff's Radical Self-Acceptance work (I attended several presentations by Neff and got far more in one hour with her than 200+ pages here) and ACT. That said, it's presented in a very simple and actionable way and could see this information being useful if you're not already very familiar with those modalities.