Sci Fi? Everyone lives, works and plays in two towers where the caste system is dependent on what floor you live on, and are never allowed to go outside... [s]

[Lisa]

Their biggest pasttime appears to be sex, and it's socially acceptable for husbands to go prowling the hallways at night, having sex with other married women (who can't refuse them)as long as they go down to lower levels to do it.

I think that any progeny is given a single, unisex name and raised in a creche until married.

The protagonist is a lower middle-class fellow, curious about upper levels and what's outside. I think he may have gotten out in the end.

[Ann aka Iftcan]

Lisa--someone else is searching for this book. Unfortunately I can't find the other post the "easy" way (by just doing a quick search on the topics.)

[Lisa]

Was it recent, Ann? I've gone through the first 50 pages of posts and didn't see anything similar.

[Lisa]

Yes, that is exactly it, Richard! Thank you!

[Cheryl]

Ann, I searched 'skyscraper' and got this: http://www.goodreads.com/topic/show/2.... I did PM the OP for that. But they don't seem like they're describing quite the same book.

Lisa, could you please visit that thread and comment whether or not World Inside could be a fit for the OP there?