Surprise us – Avoid getting stuck in a formulaic pattern. The heroine, for example, who’s happily married with children for the first two books, could have a marital crisis and end up leaving her husband in the third book. Whether or not she returns can depend on the new crisis she stumbles into on her day job as a bio-hazards expert or a pastry chef, or whatever she does. Or have your stalwart front-line combat reporter suffer from an episode of psychotic Post Traumatic Stress Disorder that makes him violent, hateful, terrorize his friends and lovers, even join the enemy. Keep us guessing as to how it will turn out.
Writing a Book Series can be Fun and Profitable
By Alan Rinzler, Reading Unbound
A Series of Unfortunate Events - successful children's book seriesScroll down for advice to writers on developing a series character