One, this is not a novel - not by a long-shot. It's a 20kish word novella with massive type and low per-page word count stretched out to just barely 145 pages. It's not worth $20 by any stretch.
Two, this is -terrible-. It's a saccharine, boring as hell, ham-handed allegory about terminal illness that feels like it was intended to be sold as the plot of a Hallmark Network made for TV movie.
What is going on with you, Steve? First it was the dreadful, plodding Bill Hodges trilogy, then the god-awful Gwendy's Button Box, which we could at least blame on your "collaborator", but now this? Have you lost your sense of direction? I have no problem with SK moving away from horror, some of his best work isn't horror at all, but he seems to have lost all sensibility as a writer of any quality.