These may also work for Introverts. Archie McPhee Magic Cat Notebook set includes three, covered in images with a sort of Galactic Zoltar theme. With cats. I like cats, but these even weird me out a little. Keep cat grouches at arm’s-length or further, and cat fans enchanted, while you ponder the metaphysical mysteries of Plato’s cave. You know that those shadows were made by cats….