Because I’m also working on the start of a new series (that will begin in 2013) it’s also made me pause and think about how I write. When I plot a series I need to know where it’s going, each book has to move the overall arc forward without making it necessary to read the books in order. Because I write romance each book also needs a different couple to find their way to a HEA.
The Sex with Strings series (Ellora’s Cave) was obviously a 4 book series as there are 4 Vampires in the rock band; Phoenix, Thanatos, Sirius and Absinthe. The Shadowlands series (Sourcebooks) was different. I decided early on that while 6 men were cursed there wasn’t going to be 6 novel length stories. How much can be written about Celtic warriors breaking a curse and adapting to modern life? So the three main guys get a book each and the others make cameos :)
Of course as a reader I appreciate a series with an end. So while my favourite fantasy series, Deverry by Katharine Kerr is 14 books, it was broken up into smaller series. The Dark Age Dawning trilogy by Ellen Conner is paranormal romance but each book moved forward in time and showed a different aspect of what was happening in the world.
As a reader what do you prefer, an ongoing world or a definite end?