A book for my gf who is struggling with depression and lack of motivation (novel, no self-help pls)

I want to find a book for my girlfriend, one that touches on the topic of depression but also one that will encourage her to gain a new perspective. I want her to feel seen in a way that i cant 🙁 but not a self help book/one w themes of religion. She has read Schoolgirl by Osamu Dazai and enjoyed it