Those Obnoxious Fairies is the 17th Proposed Serial of Spectral Shadows. It is preceded by Serial 16 - Fantasia, A World Made out of Dreams and succeeded by Serial 18 - The World of the Anthrodroids. 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 next journey to a world of fairies and humanimals were there is not a whole lot of danger or adventure, but a lot of romance and silliness.
This is a planet The Rebel Alliance had set up for displaced life forms during the age of The Astral Pirates. But so much time has past that few remember the origin of the planet.