Hannu Rajaniemi: Collected Fiction by Hannu Rajaniemi (Tachyon Publications, 240 pages, May 19)
If you haven't read any Rajaniemi, it's time to start. Winner of Finland's top sci-fi award and the John W. Campbell award, this Ph.D in string theory and quantum gravity offers us "postapocalyptic, postcyberpunk, and posthuman" stories that will make us think more about the future of humanity and technology.
My Real Children by Jo Walton (Tor Books, 336 pages, May 19)
My Real Children was one of the winners of the 2014 Tiptree Award and reminds us just how versatile and wide-ranging Jo Walton really is. Here she tells the story of an old woman who has memories of two different lives. Did she actually marry this man or that other man? Who are her "real" children? And ultimately, what is real?