Dunno if we’re still doing scifi recs and I have absolutely no idea about audiobooks. But Vernor Vinge is good. I understand that an audiobook of A Fire Upon the Deep exists. I would imagine that there is then probably also an audiobook of the sequel, A Deepness in the Sky. I particularly liked those. Also seconding everything @Musarex said about Neal Stephenson’s Anathem, though I’m having trouble just quoting the post. Not so interested in his historical fiction stuff. Loved this one. I had a total blast.