May Bestsellers
Hardcovers
1) Noir by Christopher Moore2) Tempests and Slaughter by Tamora Pierce3) Autonomous by Annalee Newitz4) Artificial Condition by Martha Wells5) Tortall: A Spy's Guide by Tamora Pierce6) Head On by John Scalzi7) The Soldier by Neal Asher8) Space Opera by Cat Valente9) Children of Blood and Bone by Tomi Adeyemi10) In Calabria by Peter S. Beagle
Trade Paperbacks1) Three-Body Problem by Cixin Liu, trans by Ken Liu2) How to Marry a Werewolf by Gail Carriger3) The Fifth Season by N.K. Jemisin4) The Last Unicorn by Peter S. Beagle5) Norse Mythology by Neil Gaiman6) Annihilation by Jeff Vandermeer7) The Stone Sky by N.K. Jemisin8) Rise and Fall of D.O.D.O by Nicole Galland and Neal Stephenson9) All the Birds in the Sky by Charlie Jane Anders10) Robots vs. Fairies edited by Dominik Parisien and Navah Wolfe
Mass Market Paperbacks1) Who Fears Death? by Nnedi Okorafor2) Name of the Wind by Patrick Rothfuss3) Left Hand of Darkness by Ursula K LeGuin4) American Gods by Neil Gaiman5) Ready Player One by Ernest Cline6) Lock In by John Scalzi7) Heroine Complex by Sarah Kuhn8) Tiassa by Steven Brust9) Red Sister by Mark Lawrence10) Arcanum Unbounded by Brandon Sanderson

April Bestsellers
Hardcovers
1) Tough Mothers by Jason Porath
2) Noir by Christopher Moore
3) Head On by John Scalzi
4) Rejected Princesses by Jason Porath
5) Autonomous by Annalee Newitz
6) The Power by Naomi Alderman
7) Space Opera by Catherynne M. Valente
8) Children of Blood and Bone by Tomi Adeyemi
9) In Calabria by Peter S. Beagle
10) Only Human by Sylvain Neuvel

Trade Paperbacks
1) The Three-Body Problem by Cixin Liu, trans. by Ken Liu
2) Norse Mythology by Neil Gaiman
3) Annihilation by Jeff Vandermeer
4) The Fifth Season by N.K. Jemisin
5) All the Birds in the Sky by Charlie Jane Anders
6) Too Like the Lightning by Ada Palmer
7) The Last Unicorn by Peter S. Beagle
8) Overneath by Peter S. Beagle
9) Robots vs. Fairies edited by Dominik Parisien and Navah Wolfe
10) Best Science Fiction and Fantasy of the Year, Volume 12 edited by Jonathan Strahan

Mass Market Paperbacks
1) The Left Hand of Darkness by Ursula K. LeGuin
2) Name of the Wind by Patrick Rothfuss
3) Who Fears Death? by Nnedi Okorafor
4) Heroine Complex by Sarah Kuhn
5) Vanguard by Jack Campbell
6) Tricks for Free by Seanan McGuire
7) Old Man's War by John Scalzi
8) Ready Player One by Ernest Cline
9) The Wrong Stars by Tim Pratt
10) Besieged by Kevin Hearne
March Bestsellers
Hardcovers

1) The Power by Naomi Alderman
2) If Tomorrow Comes by Nancy Kress
3) Beneath the Sugar Sky by Seanan McGuire
4) The Will to Battle by Ada Palmer
5) Autonomous by Annalee Newitz
6) Burn Bright by Patricia Briggs
7) Certain Dark Things by Silvia Moreno-Garcia
8) Children of Blood and Bone by Tomi Adeyemi
9) The Book of Dust by Philip Pullman
10) Impostor Syndrome by Mishell Baker

Trade Paperbacks

1) The Song of All by Tina LeCount Myers
2) The Three-Body Problem by Liu Cixin, trans. by Ken Liu
3) Fifth Season by N.K. Jemisin
4) Too Like the Lightning by Ada Palmer
5) All the Birds in the Sky by Charlie Jane Anders
6) Annihilation by Jeff Vandermeer
7) Strange Bird by Jeff Vandermeer
8) New York 2140 by Kim Stanley Robinson
9) Robots vs. Fairies edited by Dominik Parisien and Navah Wolfe
10) The Atheist in the Attic by Samuel R. Delany

Mass Market Paperbacks

1) Tricks for Free by Seanan McGuire
2) Ready Player One by Ernest Cline
3) The Left Hand of Darkness by Ursula K. LeGuin
4) Who Fears Death? by Nnedi Okorafor
5) Changing Planes by Ursula K. LeGuin
6) The Wrong Stars by Tim Pratt
7) Old Man's War by John Scalzi
8) Arcanum Unbounded by Brandon Sanderson
9) Red Sister by Mark Lawerence
10) The Name of the Wind by Patrick Rothfuss