Some fantasy series have the tendency to go on forever and ever. What really irks me is when I have waited years for another book (often the 3rd book in what I think is a trilogy) to come out, only to discover that the story doesn't end. I'm cut off and left hanging once again. My latest frustration: The High King's Tomb, by Kristen Britain. It is book 3 in her green rider series. I was sure it was going to be the last. But no. Not. And she is the slowest writer living. Dead writers are even slower, but not by much. I wish there could be a disclaimer on the first page, saying:
this book doesn't end, don't get your hopes up.
Sigh. I really must protest.
Another flaw in neverending series is that you have forgotten everything about the previous novels while waiting for the sequel. Inefficient. Tsk tsk. Not to mention the danger of the author in dying before it ends. Beware.