I'm not sure where I heard about it, but I just picked up Helene Tursten's tiny little An Elderly Lady Is Up To No Good, a collection of linked short stories about feisty octogenarian Maud.
It's dark and the protagonist Maud is mostly unlikable, but, God love her, you're not going to push her around. To tell you any more than that would be to include spoilers, and I'm not going to do that. But if you're looking for a quick, fun fiction read, you might want to try this one.
You can find a more comprehensive review here.