After reading the 3rd book, looking up reviews for the 4th and 5th books as well as in Royalroad I think it’s important to inform future readers of a few things.
There are 2 MCs with 1st mostly focusing on Reyun, however starting with the second book the other MC, Zach starts to take up the forefront of the story. While in the third book Reyun gets a bit more time, afterwards the reviews all agree that he ends up becoming a side character. (the majority of reviewers, but not all, a well as myself find Zach to be a lackluster character, but whether you like Zach is not for me to assume) starting with the second book there are EXTREMELY long stat reading points (20+ minutes of straight stat sheet reading at a time) that happen very frequently.
while the world building is initially very good, as time goes on the author seems to forget the rules he wrote and things seem to stop fitting in with what he wrote earlier. if you can get it on a large sale or free go ahead and listen, but knowing what I do now, I wouldn’t spend a credit on it as the series wasn’t worth continuing past the 1st book for me, and I only read the 2nd and 3rd book because they were free for subscribers at the time