In the tradition of the Ace Double 2-in-1 books (flip one side over to read the other book), here's the 19th Wildside Double:
COSMOCOPIA: A SCIENCE FICTION NOVEL, by Paul Di Filippo. Frank Lazorg's gone mad! The dean of the fantasy art illustrators has reached his end: his creative powers have deserted him. Then a strange new drug promises to reinvigorate him, both as man and artist. But the substance soon results in madness, plunging Frank into a world inhabited by monstrous parodies of humanity. Yet this new dimension has its own delights, as Frank soon discovers when he meets the female alien called Crutchsump! A science fiction adventure of mind and body.
AFTER THE COLLAPSE: STORIES FROM GREENHOUSE EARTH, by Paul Di Filippo. From the swarming redoubts of the polar regions, where humanity huddles from the savage heat of Greenhouse Earth, to the dusty refugee camps of a shattered America, here are six riveting tales of life during the hard-luck times of a post-holocaust planet.

Paul Di Filippo, a lifelong resident of Rhode Island, has published over thirty books. He lives in Providence with his partner of four decades, Deborah Newton.