Sci-Fi Group Book Club discussion

Our next quarterly themed group read will be in September. I've set up a poll so that people can vote on a new theme for this group read. Once the theme (or themes if there is a tie) is picked, members can nominate books within that theme (or themes) for the next group read in a new topic. After a few days, members can then vote on which two books they'd most like to read in June in another poll.

The poll for this month's theme can be found here and will go live in about fourteen hours' time (4:00 PM [PDT] today or 12:00 AM [GMT] on 17 August). I've used the suggestions made for previous themes but I've also allowed write-in votes in case anyone feels there's a theme missing from the selection. The poll will end in three days' time.