Below are a lot of guidelines on the drawing of the main characters; Finn and Jake, by the show's creators. They are used to help the animators keep their work consistent and the look of the show always fluid. I am already totally in love with this book, as it not only shows finished pieces and grabs from the show, but also all of the concept and development art. It discusses the processes the artists had to go through to create and finalize all of their characters and worlds, which is super useful to me!