Time to Orbit: Unknown is a novel by Derin Edala. It's the length of maybe 5 standard novels, but available to read in its entirety online here (some typos). This is a work in the specific genre "hypergraphic authors for voracious readers", subgenre "scifi themes". I only recommend it if you are in the target audience "voracious readers", in which case I strongly recommend it.
The story opens on an interstellar colony ship, with one passenger unexpectedly awakened from transport hibernation. This is a great setup from a novel standpoint, as the first-person narrator has no idea what is going on and provides a great introduction to the world for the readers. The fact that he has to figure out what's broken on the spaceship, from first principles, since he is not an astronaut, adds to this framing device convenience. It also makes the mystery delicious: we are discovering things at the same time as the narrator. A mystery! In space!
The author is excellent at their craft. I don't know how else to express it. This story starts as a space-scifi-mystery and every once in awhile, it completely shifts genre. (Spoilers: logistics challenge! science puzzle! rogue AI! social conflict leadership struggle! murder mystery! international interplanetary geopolitical conflict! sociology study of voluntary colonization! philosophical exploration of individuality!) Every time the genre shifted, I was absolutely convinced it was a good idea and the author brought me along. At some point I realized the game was "genre shift in an apparently-endless story" and I loved that, too.
Last week the author published the end --- chapter 183! --- of the story. It didn't end in a way I find satisfying, and it seemed a bit rushed, but honestly I don't know that any end to the infinitely-extensible-feeling beginning of the story would ever feel satisfactory.
Recommended if you have interest in a long reading project that is a bit silly and a bit tense and 100% scifi in the post-publishers-encouraging-doorstop-series era.
This post's theme word is ontic (adj), "having or relating to a real existence." Certain genre staples of science fiction are purely joyful, not ontic.