I finished The Citadel of the Autarch last night. One could make the same general comments as for the other three books in the tetrology of course (dense, difficult to follow, inventive, strangely engrossing, well drawn scenes) but by now I think these are a given, so I'll not dwell on Gene Wolfe's slightly maddening, yet unique style.
I was hoping that, as the end of a series of books that are meant to stand alone (I know there are sequels, but this was written as a complete series and is always published as such), the book would reach a more definitive conclusion relating to the whole point of the books (i.e. the coming of the New Sun). One might argue that the pay-off in Citadel is that it explains what was going on in books 1-3, but to be honest, well before the end of this volume I understood who was what, what had happened and exactly what was going on. The end of Citadel therefore didn't have this pay off for me as there was no great 'reveal' such that the scales fell from my eyes. I read to the end and thought to myself, "well yes, okay, that was fine, but I'd worked all that out already and why didn't you finished the story"?
The four volumes of The Book of the New Sun are effectively an extremely dense and confusingly written 800 page prologue to a book written four years later. Having read it all, Urth is now in a position to consider obtaining a New Sun. That's a slightly trite over-simplification, but I did feel rather cheated. After reading all four books the over-riding purpose in the plot hasn't actually begun. I realise the follow on stand alone novel, The Urth of the New Sun does just this - and I guess I now have to read it - but one doesn't read an extremely dense and difficult four book series as a prelude to a separate 5th that was written years later.
Anyway - that aside - what did I think of the series as a whole, and would I recommend it? I think its a rewarding journey you take with Severian, and many of the scenes are excellent and beautifully drawn - Wolfe can write very well, when he cares to. Some of the diversions are unnecessary and slightly maddening, but they do lend the books a strange mystique that is memorable. At the end of the day, I'm glad I read it. It is certainly memorable, different to anything else I've read and mostly entertaining. Many have suggested that you have to re-read the series to get it (Wolfe even asks you to at the end of this book), but I think I get it already and life is short, so whether I do go through it again we'll have to see. I read those sections that were most confusing to me more than once in this reading and went back occasionally and re-read earlier passages to ensure I understood what was going on, after all. And would I recommend it to others? Probably not. Not because its bad, but because the chance would be too high that the person I recommended it to would stop talking to me, in high dudgeon. It's too idiosyncratic and purposefully difficult to recommend. Wolfe goes out of his way to make it as impenetrable as possible, after all - that's his style. I think folk should make their own minds up whether to give it a go. But if you do - you will have to read the later 5th book, or the main crux of the novels doesn't actually start, let alone finish.