A medley in which the reader visits a handful of established fantasy universes.
In the first story, "Goddess of the crossroads", Kevin Hearne invites us into the world of his Iron Druid series, which I have not yet read. Here, we get a story featuring Shakespeare in his own time, a bunch of witches, and a nice display of what I have to assume is how the magic works in this particular world. I enjoyed the voice and telling of the story, and probably will seek out these books when I need a new series-thing to read.
Second story, "Ashes", appears to be an origin story for Laura Bickle's series about Anya Kalinczyk and her salamander familiar. Anya is a rare kind of medium, and turns out to have other peculiar qualities, but her day job is with the Detroit fire department. In this story, she's hunting for the Nain Rouge, which I had never previously heard of, but wikipedia confirms: This is actually a thing. The Nain Rouge, "Red dwarf", is a Detroit urban legend in a "harbinger of doom" kind of way, and just as in the story, there are related parades and whatnot. The more you know!
Do I feel like spending more time with Anya and Sparky the salamander? Maybe not immediately - I didn't feel like she could knock out my existing queue of "urban fantasy protagonists punching things in book series"-stuff.
The third story is by Aliette de Bodard, and "The death of Aiguillon" takes place some sixty years prior to the events of the novel The house of shattered wings. This is a world I know and enjoy already, and it centres on a couple of the characters I was most fascinated by in the novel. Awesome! But would I like it quite as much if I didn't already have larger context for the characters and events? Probably not - but I suspect that's true of all the three first stories in A fantasy medley 3.
The fourth and last story, however, is a standalone: Jacqueline Carey's "One hundred ablutions". I've never read this author before, though I have been sort-of meaning to. I really liked this story about a subjugated desert people and the mysterious people who rule over them - it lingers on, weeks after reading.
I think this collection is most of all a special interest piece for fans of one or more of the universes represented - which is a-okay. (I really do respect that - as a specially interested fan myself, it is proving very hard to get my hands on A fantasy medley 2 and its stories..!)