I love Hyperion and The Terror. They’re amazing novels, not just amazing speculative fiction novels. The former is a crazy far future religious Canterbury Tales, and the latter is a painstakingly researched account of what happened to a real lost Arctic expedition except that there’s monsters. So well written, and the audiobooks are also great (the Hyperion audiobook has a full cast).
I’m not a Simmons fanboy though. He’s fallen off the deep end politically in later years (IMO, of course), and besides that, not all his books are that great. I’ve read a bunch and none blew me away in the same way, and some I thought were borderline bad. BUT I’ve been meaning to check out Ilium, so I guess this is as good a time as any.
But I’m not kidding about Hyperion and The Terror, I just need to emphasize that. Everyone should read them. They’re some of the most imaginative and evocative (respectively) books I’ve read. Please read them.
The Terror was also made into a TV miniseries (or, well, anthology series, but the second season has nothing to do with Dan Simmons and also it’s bad). It’s very good, and has some amazing actors.