What I really like about @gregeganSF 's books is that they are a kind of fiction that is based (or at the very least heavily inspired) on the actual science and physics (and some books on computer science and philosophy).

Take a look at this write up on the physics of his latest masterpiece "Scale": (slight spoiler warning) https://www.gregegan.net/SCALE/01/ScienceOfScale.html . It is fascinating to read and think about this article even by itself, but the book gives you much more than this!