Books to read ahead of the anticipated significant loss of a loved one?

I'm a 48-year old man, father, husband. I have been incredibly fortunate in my life in that I have never suffered the loss of someone who is particularly close to me. Distant relatives, or relatives who I did not know well have certainly died, but I still have my siblings, my parents, my closest friends.

But I anticipate in the not-so-distant future, I may lose one or more of those people that are particularly close to me (a male that has been the closest I've had to a father, for instance). I genuinely struggle to anticipate how I'll cope with such a significant loss; having made it this far without having experienced the same.

And I love to read. If anyone has books they can recommend for me to read in the coming months, I'd welcome the input. They don't necessarily have to be books directly addressing loss/grief (but they can be); books that help provide big perspective and appreciation for what has been had (if that makes sense) are welcome too.

For whatever it may be worth, I enjoy the classics, regular fiction, and really good writing; I'm not particularly into crime, mystery/suspense, or science fiction. Over the last year, I've read Something Happened (Heller), Fahrenheit 451 (Bradbury), To Kill a Mockingbird (Lee), Tinkers (Harding), In the Shadow of Man (Goodall), Lonesome Dove (McMurtry), James (Everett), The Salt Stones (Whybrow), and Trust (Diaz) and enjoyed them all.