Oops, Wrong Planet is the 20th Proposed Serial of Spectral Shadows. It is preceded by Serial 19 - Samurai of the Sun and succeeded by Serial 21 - Jumping Off the Sun. This serial is currently not in the works, and the only material available is the summary from the Synopsis Page.
The summary is as follows:
The crew of the Rocinantè arrive on a planet populated by creators of worlds - people who have only to imagine to cause things to come into existence. Allegorical writers and fantasists. Here they wind up playing matchmaker between a certain goddess and the young devil who is smitten with her.