[HangnJudge]

As fantasy is included...
The Lord of the Rings - Tolkien
The Space Trilogy - CS Lewis ( only Christian SF ever written )

[GoneSalt]

" As fantasy is included... "

If fantasy is included, one series that left me spellbound, enwrapt in delicious literary bondage, was The Chronicles of Thomas Covenant the Unbeliever by Stephen R. Donaldson.

10 books to tell the tale; it is not for the commitment-phobic ;)

[HandyDandy]

Such a list would need to also mention The Hobbit, and Silmarilion.

I am not sure where One Hundred Years Of Solitude would fit in.

[metmom]

The Space Trilogy

I read that and absolutely hated it. the books got progressively creepier, and the last book, That Hideous Strength, just pushed me over the edge. It gave me the willies.

Never again.

[Popman]

The Space Trilogy - CS Lewis ( only Christian SF ever written )

Excellent read...

[Ransomed]

My Freeper handle is from the CS Lewis space trilogy. That Hideous Strength is one of the most prescient books I have ever read. That said, there is a bunch of great Christian sci-fi besides that.

Gene Wolfe, RA Lafferty, the tragic Walter M. Miller all wrote and in Gene Wolfe’s case still write.

Freegards

[tbw2]

The “Infinite Space, Infinite God” sci-fi anthology series is also Christian science fiction.

[grey_whiskers]

You might want to consider the late Charles Williams -- a member of the Inklings, and a first-rate writer of supernatural thrillers.

Look up Castalia House (Vox Day).

John C. Wright is very good.

For non-Christian stuff, Keith Laumer's Retief short stories and novels, and of course, Poul Andersons Polyseotechnic civilization saga (Nicholas van Rijn), and the Dominic Flanders novels.