Short interview here.
What do you do when you encounter what's called "writer's block?" When I do it's important to be reading—three or four different books at a time, so those books begin to have a conversation with each other. Then I begin to engage what that conversation is about, and words come out. If I don't have words, it's a sign I'm not reading enough. I read mostly nonfiction, classics, a lot of C.S. Lewis, contemporaries, John Piper ... a lot of theology because I'm trying to figure out how to make theology very practical, for the kitchen sink, for the moms with a lot of young babies.