This is my favorite LN series, so take it as a biased opinion, but these are the only LNs I have physical copies of. They are actual hardback books unlike most other LNs I have looked at in the past (Overlord is the only other one I have thought about buying in the past that is a hardcover). My only complaint is that the official English translation is super slow. The Japanese releases are two volumes ahead right now with no announced English release of LN5 yet.