Is it worth it?

So I’ve just finished book 8, i’m pretty sad cause most of my favourite characters are dead, Anton shudder, kenspeckle and ghastly to name a few. Unfortunately the ending for book 9 has sort of been spoiled for me. But like I don’t know how the series can be great with so many dead characters, but who knows, everyone died in got season 3 and it was still good.
I’m sure this has been asked before.