I was 13 years old when my local public library got a copy of Frank Thomas and Ollie Johnson's 1981 book "The Illusion of Life: Disney Animation". I borrowed that book as often as I possibly could, I learned to sketch and animate from it and used to practise drawing the characters and forms within it. The book effectively documents the principles that Disney Studio's helped develop that define compelling animation. There is a great article on UX design in Smashing Magazine explaining how the concepts in the book relate to modern user interface design. Worth reading. Click on the image or title to learn more.