I was trying to focus on Margaret's trajectory as an artist, as a woman and an artist. Hopefully Cavendish experts won't be angry at me for anything I've left out. I feel like all the major movements of her life are there.

So it was this multi-perspective, multi-character book, and it went through all of these different manifestations. I'm not sure there was a single moment where I thought to myself, Oh, I need to write about Margaret Cavendish. She just kept taking over the book I thought I was writing.

I was sad to see some of them go. Like a magic lantern that would project images on walls and people would travel the countryside with these magic lanterns and tell stories. And there was this cabinet that you would walk up to and it had a little peephole and inside the whole thing was covered in thousands of little mirrors.

Finding the form was really a very dynamic process. I went through a lot of shifting, trying to get it right. Because the writing took place over such a long time, it's hard for me to pinpoint when specific things happened, but basically the final version only materialized in the last two or so years. It was there, but it took me a while to see it and then to refine it after I'd seen it.

But when I realized it was actually going to be this portrait of the artist, birth to death, I had to then discover who Margaret as a young woman would be. I had to find the different voices for her throughout her life. I had a lot of fun discovering that. I had a lot of fun writing the childhood sections. By imagining her childhood, I was able to come up with this voice that matures as she gets older.

I'm not sure running the press has changed how I write (though perhaps it has in ways I can't see), but it has certainly changed my relationship to how books get made.

The reason the middle section switches to third person is, well, this is middle age. This is the part in her life where she loses track of something that was driving her and has to figure out what's going to drive the next part of her mission, this mission to be an author. I had to push back away from her for a while before we could come up to that really lyrical close third in the final section.