Look what I have made with my own two hands!
On April 4, 2012, I wrote the first 185 words of what would eventually become The Iron Dragon's Mother. Today, I finished the novel and the trilogy that I didn't set out to write.
When The Iron Dragon's Daughter was first published in 1993, it was intended to be a stand-alone novel. Then, ten years later, Marvin Kaye hit me up at a convention for a dragon story for his anthology, The Dragon Quartet. "I don't have any ideas for a dragon story," I told him. "But if I think of one, I'll send it to you."
In the strange way that such things sometimes happen, I went home, sat down at the computer, and immediately came up with an idea for a dragon story. And when "King Dragon" (published in 2003) was complete, I recognized that it was the opening segment for a new novel. Thus, The Dragons of Babel, which was first published in 2008.
When you have one book set in an imaginary world, it's a novel. When you have two, it's an unfinished trilogy. So I found myself in a situation similar to that of the guy who lives downstairs from a pooka and is waiting for the third shoe to drop.
The protagonist of the first book, Jane Alderberry, was in a world where she did not belong and so, no matter what she tried, she could not find a place for herself. The protagonist of the second, Will Le Fey, was a native of Faerie, and so he had to find a place for himself. I was an English major... I can recognize Thesis and Antithesis when it stares me in the face. So I knew there had to be a third novel and that it had embody Synthesis. But I had no idea what that might be.
Until five years ago.
And now the trilogy is done. At a good guess, I probably began writing The Iron Dragon's Daughter in 1991. So it's taken me 26 years to write my trilogy.
I cannot help noting that Tolkien's trilogy only took him 12.