Yes, this tetralogy* is spellbinding. The world is vast and cannot be fully comprehended. As you said, it feels quite real, and everything that happens around Severian hints at so much more. This book ought to be at the top of every SF aficionado's reading list. It's that good. I'm glad yours is the top comment right now. I have been thinking about how the trend in long-form television would be very favorable for translating some of Wolfe's books into film and exposing them to a broader audience. There are so many things in New Sun that would make for compelling television, and we have the technology to do the special effects right--that is, not a CG-fest, but (mostly) subtle and in service of the story. His fuligin cloak alone I would love to see in motion. Though I think the way the story is told would have to change drastically, unless they were to keep the narration--which is a tricky prospect. Part of the book's charm is that you never know if what you are imagining based on what the narrator says really happened that way, and people put enough faith in what they see to lose that aspect.…
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