I don't even know. When a series is 22 books long and is really just a large story broken up... They start to run together. And, I am atrocious at reviewing books so it is not like I can go back to my archives and reread my thoughts on all 22 of them... I do know that there were strong volumes and then there were weaker volumes. I found around volume 13, after the big crossover, there were some hiccups as they tried to come up with a new main storyline. That happened again once those events started to die down. I can also safely say the spin off series never appealed to me as much as the main series. I have read them all, but they were never as good for me.