C.S. Lewis - Space Trilogy !LINK!

The eldila (singular eldil) are super-human spirits. The human characters in the trilogy encounter them on various planets, but the eldila themselves are native to interplanetary and interstellar space ("Deep Heaven"). They can, if they want, remain fixed to one point on a planet's surface - but that requires a conscious act on their part, without which they would instantly drift away into space.

C.S. Lewis - Space Trilogy

However, the books themselves are not especially concerned with technological speculation, and in many ways read like fantasy adventures combined with themes of biblical and classical mythology. Like most of Lewis's mature writing, they contain much discussion of contemporary rights and wrongs, similar in outlook to Madeleine L'Engle's Kairos series. The kidnapping of Ransom by Dr. Weston is reminiscent of Flash Gordon being forced into Dr. Hans Zarkov's spaceship in that series. Many of the names in the trilogy also reflect the influence of Lewis' friend J. R. R. Tolkien and his Elvish languages. 041b061a72