My title is a lie, actually — this is a list of books I’ve read since Readercon in July of 2015, and it’s only the ones that are Hugo-nominable. If it didn’t come out in 2015, it doesn’t make this list because I want to focus on what can be nominated for a Hugo right now.
The Galaxy Game by Karen Lord
Half-Resurrection Blues & Shadowshaper by Daniel Jose Older
An Inheritance of Ashes by Leah Bobet
Lex Talionis by RSA Garcia
An Ember in the Ashes by Sabaa Tahir
The Just City by Jo Walton
Updraft by Fran Wilde
House of Shattered Wings by Aliette de Bodard
Of Noble Family by Mary Robinette Kowal
Pocket Apocalypse and Red-Rose Chain by Seanan McGuire
Book of Phoenix by Nnedi Okorafor
Grace of Kings by Ken Liu
Time Salvager by Wes Chu
Court of Fives by Kate Elliott
Karen Memory by Elizabeth Bear
Only Ever Yours & Asking For It by Louise O’Neill
The Fifth Season by NK Jemisin
Sorcerer to the Crown by Zen Cho
Ancillary Mercy by Ann Leckie
Last First Snow by Max Gladstone
Uprooted by Naomi Novick
Zeroboxer by Fonda Lee
Cold Iron by Stina Leicht
Chimera by Mira Grant
Revision by Andrea Phillips
The Sin-Eater’s Daughter by Melinda Salisbury
Deceptions by Kelley Armstrong
The Sculptor by Scott McCloud
Bitch Planet by Kelly Sue DeConnick
Stand Still Stay Silent by Minna Sundberg
Collected Fiction by Hannu Rajaniemi (short story “Skywalker” is Hugo-nominable)
The Otherling & other stories by Anne Leinonen (short story “The Skinner” is Hugo-nominable)
Angels & Exiles by Yves Meynard (short story “The Song of the Mermaid” is Hugo-nominable)
Falling in Love with Hominids by Nalo Hopkinson (short story “Men Sell Not Such in Any Town” is Hugo-nominable, I think?)
Stories For Chip (full of short stories that are Hugo-nominable)
Octavia’s Brood (full of short stories that are Hugo-nominable)
Queers destroy SF (full of short stories that are Hugo-nominable)
I don’t want to get into any reviews or details, at this point, because I don’t really have the time and I don’t know if I’m up for it. I read all of these things, however, and thought they were magnificent and (so far as I’m aware) Hugo-nominable.
Other things & stuff:
Maija Peitikainen and Petri Hiltunen did the bid art for Helsinki in 2017, Hugo-nominable under fan artists.
Christopher Jones does amazing work for art for Convergence and is Hugo-nominable.
Nisi Shawl, Bill Campbell, and Carl Engel-Laird are all Hugo-nominable editors, so far as I can discern.
The Finnish fanzine MARVIN (published sometimes in Finnish and sometimes in English) is Hugo-nominable this year. This is the same crew of people who brought us the brilliant and needed articles about the shortage of evil villain bases of operation. We may need to rent co-working space in future, apparently.
Okay, I lied again, because I don’t want to lose track of what little I managed to track reading this year…
Things I read that aren’t 2015 Hugo-nominable, but that I still tracked:
(The Younger Gods, Michael Underwood, 2014)
(First three novels in the Ex Libris series by Jim C. Hines)
(How to Suppress Women’s Writing by Joanna Russ)
(Too Like the Lightning & Seven Surrenders by Ada Palmer — 2016 books)
(Unspeakable Things by Laurie Penny)
(Story of Your Life by Ted Chiang)
(A Natural History of Dragons by Marie Brennan)
(Omens & Visions by Kelley Armstrong)
(Ancillary Sword by Ann Leckie)
CrystalVisits 
Where do you find the time?! I read about one book a week but have not kept a list.
Lol. I read a lot at the gym while exercising, and in the sauna (although I know it’s not good for the books), and while waiting for appointments, and while going to sleep, and while on planes. Apparently I’m no longer very skilled at sleeping in transit. 😉
I’ve read 10 of the 2015 books you’ve read. I’ve read parts of the anthologies listed. Our list doesn’t have as much overlap as I’d expect. I’m not passing enough books on to you. 😉