For anyone looking for a deeper dive into how Pixar iterates on their movies and how highly-functioning creative teams can work in general, Creativity, Inc. by Ed Catmull is a really interesting book.

It goes into the history of Pixar and some of the detail of how they work with actual stories from the movies they've made. One of my favorite anecdotes from the book is how they nearly almost lost all the work they did on Toy Story 2 and almost went under.

One caveat is that the book doesn't cover the news about John Lasseter's misconduct, so it's not all roses, of course.