Design is in everything we make, but it's also between those things. It's a mix of craft, science, storytelling, propaganda, and philosophy.
Books are great for if you want to work on the craft of writing for yourself, or, you know, to write novels or indie films, stuff like that.
Actually, here is something I'm passionate about that, looking around me, seems like the world at large must not care about as much as I do: craft.