I might have had to visit an online bookseller to see what all the fuss is about - and invest in the winning books. Actually I invested in the books by the other finalists as well. So I now have the following on my Kindle:
The Sudden Appearance of Hope by Claire North (Redhook; Orbit UK) which is this year's winner.
Borderline by Mishell Baker (Saga) - finalist
Roadsouls by Betsy James (Aquaduct) - finalist
The Obelisk Gate by NK Jemisin (Orbit US; Orbit UK) - finalist - and since this is the second book in The Broken Earth trilogy I also had to buy those on either side of it, didn't I. These are The Fifth Season which I think won a Hugo last year and The Stone Sky.
Lovecraft Country by Matt Ruff (Harper) - finalist
The there's the long fiction:
The Dream-Quest of Vellitt Boe By Kij Johnson (Tor.com Publishing) this year's long fiction winner
The Ballad of Black Tom by Victor LaValle (Tor.com Publishing) - finalist
Every Heart a Doorway by Seanan McGuire (Tor.com Publishing) - finalist
A Taste of Honey by Kai Ashante Wilson (Tor.com Publishing) - finalist
I also bought one anthology Dreaming in the Dark ed. Jack Dann (PS Australia) and winner of the anthology section before guilt kicked in and I decided I'd reached my spending limit for now. Maybe I'll go back for the rest when my credit card has recovered.