The trouble with trilogies

I have a confession to make:  I have never deliberately written a trilogy before in my life.

Yes, I know, there are four Enchanted Forest books, and three Kate and Cecy books, and the Lyra series, and so on. But with all of those, I didn't set out to write more than one book. I wrote a book, and then readers and editors asked for more.

This time, I signed on for three books right from the start. It seemed like a good idea at the time, and I don't know that I can say I regret it, but it's…different