As I said, read Er Gen novels. Renegade Immortal is his first and longest work, which is also my personal favorite. Rest are also good, especially the last ongoing one. Oh, there is the reading order for er gen novels because they are all connected - Renegade Immortal (it is actually second in the timeline but read it because there are terms that are introduced in this that are used in Pursuit of the truth that is first in the timeline) -> Pursuit of the truth -> I shall seal the heavens -> A will eternal(this one is a outlier as it is just in the same multiverse but you don't need to read it but do read former ones before reading this for best experience) -> A world worth protecting -> Outside of Time.
