I would agree with the majority of posts here that suggest most series are stretched too long, presumably as cash cows. They also tend to have ever greater enemies so that the eventual denouement has to really stretch credibility.
I am surprised no one has mentioned the greatest problem, unfinished series (not just game of thrones) but the worst example of all Melanie Rawn's "exiles" series, where after two great books, the second in 1997 we are still waiting the concluding book, "The Captals Tower"
then there is also Patrick Rothfuss
I have seen post by people who never start series until all books are written
|