War Unicorn was published last fall with Books We Love. I loved (and hated) my characters enough to keep thinking about them, wanting to send them on more adventures. Hence: a series began.
I have two of five planned books in the series written, awaiting final editing and approval and release dates. I find the remaining three books harder and more complicated to write because of the additional people and places, but I must persevere.
What I’ve learned in writing a series:
1) Characters – Keep the main characters consistent throughout; obviously, there will be additional characters thrown in the mix with each book, but keep your protagonist and main antagonist forefront;
2) Plot – Not only does each individual story have its own arch with a satisfying endings, the entire series need to have an over-arching plot thread which makes sense; maps of the world, outlines of plots, family and other relationships trees also help here;
3) Space your release dates (and therefore, finish writing each story) to keep your readers interested and not too far apart in time so they don’t forget who is who and what they want;
4) Writing a series is a major commitment; if you begin one, don’t give up; set clear goals (if your editor doesn’t do it for you), and push through to see them accomplished.
5) Keep on writing, and good luck to you.