I can't tell you how often a secondary character intrigues a writer. Sometimes it's darn hard to keep that character from playing too big a part in the book, and long after the book is done that character's own story pesters, nags, nudges, and sometimes finally gets a book of his or her own. That's how series are born!
Such was the case in the Magic trilogy. In Midnight Magic, Gwendolyn had two sisters. As part of the plot, both of those sisters were sent away from home. I kept wondering what happened to them! So Emma's story became reality in Twilight Magic, and Nicole's story is told in Magic In His Kiss (which will be on the shelves in a couple of weeks!).
Confession time. It should come as no surprise that authors are also readers, and we easily get caught up in other authors' stories.
As soon as I finished reading Scream For Me by Karen Rose, I sent her an email telling her I loved the book – then asked her for the stories of two of her secondary characters. She tells me I'll get my way with at least one of them. Made my day!!
So back to my original questions. What's your experience with secondary characters? Is there one in particular whose story you're just dying to read (or write)?