It's such a deliberate thing to sit down and write a tweet. You're putting yourself out there in a very deliberate way, and over however many tweets, you start to create a character for yourself.

When you're writing something, and you're putting yourself out there, or you're performing and someone comes in and savages that, then of course it feels personal. It doesn't feel like it's just business, because there's no business - it's not like we're conducting business, this anonymous critic and I. It's just that this person is tearing me a new asshole.

My process is surprisingly straightforward. I find myself with little to do over a stretch of time and I say, "I should write children's books today." Then I sit down and write a children's book, and if it takes more than, realistically, three hours, I feel like I've done something wrong.

Whatever I write I publish. Because that's where the money is.