I loved reading historical novels when I was young, but I definitely don't think I wrote one. When I read my book through, when it was completely done and in printed galleys, I was surprised by how uninterested in the passage of time and history the book seemed to be. Even though you can feel it all there, that's just not what it's focused on.

I had all these sparkles I'd collected and wanted to work in, but when I originally started writing it and it was originally this novel about all these people set in 1666, what I was so interested in was the New Science.

The way I've talked about my research process is that it was like magpies. I was just sort of moving through all these books and when something shiny would pop out I'd be like, Ooh, I love it! and I'd pluck it out. It's fun to figure out how to use those bits you really love - like I'd read about gold shoes with cork heels. Obviously, Margaret would have to wear those shoes.

It's all just so fraught when you're writing and then going through the editorial process. It feels like this shape-shifting thing. When it's done, and you can't change a single word, it's a totally different thing. I was surprised by what that thing was.

As a publisher what you are trying to build is a long life for a book, to help it find its readers in many different ways, whether or not it made this list or got that review, etc. I'm sure some of that thinking has been useful to me as a writer as well.

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.

I was obsessed with the scientific instruments people were building and all the weird experiments they were doing. I did actually wind up working in some of that, but there were whole sections I'd written about these instruments that ultimately had to be abandoned when I realized that the book really was about Margaret Cavendish. I couldn't justify using all of them.