Michio Kako interviewed both scientists and science fiction authors for his recent book The Future of Humanity. If you want to think about the long-term future of the human race, this is a book worth reading. Kako lays out in an orderly fashion how we can establish a settlement on the moon; then gradually work our way to Mars and moons in the outer solar system; and leave the solar system, the Milky Way, and possibly even our universe. Of course, there is the slight problem of overcoming the current obstacles we face first. Besides colonizing space, Kako also suggests that we may overcome death (I wonder if I'll live long enough to see that) and will adapt ourselves to new planets while still retaining our basic humanity. I guess it's up to the science fiction writers to fill in more details about that.
Speaking of speculative fiction, I'm part of another group giveaway on Instafreebie. You can check it out at this link. The giveaway runs through the end of the month and includes science fiction, fantasy, and horror. I hope you find some interesting new books there!