I just stumbled online upon the new Chronicle Books catalog and discovered two upcoming books which should interest you:

- The Art of The Good Dinosaur, of course, but also
- The Art of Funny, a book which is described as follows:

[Each of Pixar Animation Studios’ films begins with the artists in the story department throwing ideas around to see what works best. This fun, collaborative process often results in hilarious scenarios, inside jokes, and illustrated gags, some of which will never make it to the final cut of the film. The Art of Funny features inspired gags from the creation of all of Pixar’s films to date, from Toy Story to Monsters University, bringing together never-before-published illustrations and doodles from the depths of Pixar’s archives.]