Yesterday, we took a journey into the unknown, with fantastic images that could have been science-fiction book covers or rock album covers. Today, the unbelievable truth is revealed!

I was not surprised that our many io9 rock gods recognized most of the covers, and I was chagrined that I accidentally included two Queensryche covers. (But come on. Queensryche's covers are like science fiction gold!) I was, however, stoked to discover that a lot of the covers got pretty evenly divided votes, including some of the more obscure albums like Terraforming and Wolfmother.

Most people thought the Budgie album and Expect No Mercy by Nazareth were book covers. And most people thought Ellison's The Beast That Shouted Love At The Heart Of The World and Norman Spinrad's Little Heroes were album covers.

Here are all the covers we featured, plus a few more that we almost used:

Send an email to Charlie Jane Anders, the author of this post, at charliejane@io9.com.