I've heard incredibly good things about, of all things, the recent audiobook which was apparently based on what was going to be the original Gibson sequel script before, you know, things happened. Even has some of the cast!

Which is this, please? I just tried to look for it, and there are a whole lot of Alien audiobooks.

I've listened to it, and I can vouch for its quality. Biehn and Henrikesen sound notably older than they did in 1986, which should come as no surprise. But it's overall great. The Dark Horse comic book adaption is also well worth checking out.