What are some good books for someone who is going to die soon (See Details)?

This is regarding my Mom. She is a retired librarian and has a voracious appetite for novels and the occasional non-fiction book. I am looking for books that will perhaps ease her mind a bit. I’m not sure she’s necessarily scared of dying. She’s just scared of what she’ll be leaving behind. I want her to be able to read something and say – “Okay, they’re going to be all right.” Something soothing. I’ve given her some Dalai Lama books, but anything too deep into Buddhism will be lost on her. I also got her a copy of Oliver Sacks’ Gratitude. (It’s wonderful.)

I head on down to the library at least three or four times a week for her. We’ve been sticking to bestsellers, so its mostly been fiction. (The library has a collection of “Bygone Bestsellers”. We’re waiting for them to add the 2015 Bestsellers – We’ve basically hit the wall from 2014 and prior! Also, the Bygone Bestsellers are only Fiction at my library. I’m not sure why!) Oh, and she’s bed-ridden, with no Internet access. I just revived her Kindle so hopefully she can start browsing the web herself, but right now its been just trial and error.

I can start assembling a list of some more books she’s enjoyed, but I’d like to see if anyone has some decent suggestions. Thanks!