What's the ideal length of a fantasy series? Some readers prefer trilogies and others want to read a series with ten to fifteen books. It seems to me, depending on the frequency of new releases, long series can be too much of a good thing. Many readers refuse to begin a series until the last book is published, and who can blame them? A one-year wait that turns into five is frustrating enough, but some series have been abandoned, leaving the story unresolved.
The ideal solution seems to be shorter, interrelated series, providing readers with multiple entry points. The plot for my Gem Powers Series lends itself to this structure. The first three books take place in the gnome world and follow the adventures of human characters before and after they liberate gnomes from an oppressive ruler.