We love Pixar, and we’re a bunch of creative professional types. So as you can imagine, we devoured “Creativity Inc.”, by Pixar president Ed Catmull. Is it a business book or an anti-business book? How do you foster creativity? Is Pixar’s formula one that provides safety while preventing works of staggering genius? How much is a director or writer the author of a Pixar movie, and how much is the studio itself? And is the wild success of “Frozen” proof of anything?