Rendezvous with Rama.

Very little sci fi is still talked about decades later. And often, that which is, how the author was a huge asshole/sexist/etc. is a part of that conversation.

I haven't heard any of that about Arthur C. Clarke. And the book is still solid both in it's sci fi and its politics. If anything, it's more optimistic than more modern fair.

I really enjoyed it, albeit that it took a bit to get though.

... that is, it's 50% description of a docking maneuver, and 50% setup for an exciting book.

I guess that makes it one of those books you should read once, but I didn't manage to enjoy it much.