Islands in the Sky

From publisher blurb: Recently something very unusual has been discovered in the cloudy skies over the water workd Urnadkapus. There are islands floating over the vast ocean. These islands have never been noticed before due to the sparse population of this world and the near constant cloud cover of this world. Who might have lived on these islands? Are there alien relics there to be found? What power source allows for these islands to float as they do? The patron offers payment for travelers brave enough to visit these islands and find out.