I picked up a copy of this set of four short stories from the library because I have become part of the "I will read anything by Robin Hobb" fan club. And I'm glad I did, because the short story (nominally in the same universe as her Assassin universe, but really it could be in any generic "magic works" land) demonstrates all the qualities of a Hobb novel on a smaller scale: wonderful characters, an intriguing problem, and a non-obvious solution. In this case, it's an under-taught hedge witch trying to cope with a difficult situation and a new-to-her magical being.
You certainly don't need to know anything about Hobb's earlier books. Also, unlike her novella (in another story collection) about the founding of the Rain Wilds, it doesn't add any "Oh THAT explains it" information for those of us who are in love with that particular world. Quite simply: a fun story, well told, great diversion. That's enough.
To my joy, I found that the three other stories in the book are equally charming. That's rare in any short story collection; usually I expect at least one to be a disappointment.
As with Hobb, the authors revisit worlds that they created in longer works. (All also have female protagonists, which may or may not be intentional.) Kelley Armstrong writes about a vampire in modern-day Toronto, based on Otherworld; Kate Elliot returns to Crown of Stars for a story about a woman struggling with gender roles; C.E. Murphy -- well, maybe her tale about Baba Yaga's daughter is standalone. In any case, I hadn't read anything by these other authors before (or at least it's been a long time; Kate Elliot seems familiar, though that particular universe is not) and I can comfortably assert that none of them require previous knowledge.
It's an enjoyable collection of short stories. Recommended.