Novels (possibly memoirs?) with someone dealing with heavy grief

I lost one of my two soul-cats on 9/28/25 and it has been the most brutal thing. This holiday has been completely miserable. I don’t have human spawn and this dude left me so suddenly and shattered my world. Please, no “it was just a cat”s.

Because I know I’m not feeling the kind of grief that really fits into any of the pet-loss boxes, the available self-help for this topic hasn’t been a win for me.

The reason I’m requesting fiction suggestions with themes of dealing with grief is that every real story of grief I have tried only makes me feel worse, because I want to hunt that person down and hug them and cry with them.

I’m open to memoir suggestions for the future, but I think that I need to try the fiction route for the time being.

I haven’t had success with support groups or self-help books, but there has to be something I can relate to/cope with, because I’ve spent the last week sobbing and miserable.

Books have always been able to help me when nothing or no one else can.

Thanks in advance.