"The kind of classic fifties-era first-contact story that Jonathan Swift
might have written, if Jonathan Swift had had a background in game
theory."
-- (Hugo nominee) Peter Watts, "In Praise of Baby-Eating"
Three Worlds Collide is a story I wrote to illustrate some points on naturalistic metaethics and diverse other issues of rational conduct. It grew, as such things do, into a small novella. On publication, it proved widely popular and widely criticized. Be warned that the story, as it wrote itself, ended up containing some profanity and PG-13 content.
- The Baby-Eating Aliens
- War and/or Peace
- The Super Happy People
- Interlude with the Confessor
- Three Worlds Decide
- Normal Ending
- True Ending
- Atonement
PDF version here.
I don't agree with your characterization. I would say that the major theme of the first book is attaining self-knowledge, while the major theme of the second and fourth books is overcoming abuse.
The major theme of the third book is confronting mortality. In that book the land of the dead is portrayed as a terrible place, and the heroes of the book struggle with everything they have and are to escape it. But it's true that there's a villain whose quest for immortality is portrayed as selfish and dangerous.
The major theme of the fifth and final book is looking outside the self and understanding others. There's some business with the land of the dead involved in this one too, but there's an answer given that I don't think boils down to death-worship.