I love sci-fy but am open to most well written adventures.
1
Project Hail Mary
It has everything, fun, aliens, mystery to solve, both emotional and scientific. Did I say fun?
3
Dirk Gently’s Holistic Detective Agency
This is an old favorite. He writes stuff that I wish I would have thought of.
4
Trust (Pulitzer Prize Winner)
Mr. Diaz uses language to paint breath-taking pictures. It's historical fiction, not Scify, but oh so good!
5
Seveneves
This is another all-time favorite - but it's a lot of reading . Science, politics, end of the world, revolution.