What is the title of the book authored by Disney animators Frank Thomas and Ollie Johnston?

The title of the book authored by Disney animators Frank Thomas and Ollie Johnston is "Disney Animation: The Illusion of Life." This book is highly regarded in the animation community as it provides both a comprehensive overview of the principles of animation and a deep insight into the techniques and philosophies that defined Disney's approach to animation during its golden age.

Frank Thomas and Ollie Johnston were key figures in the development of animation and contributed significantly to many classic Disney films. In "The Illusion of Life," they share their experiences and the principles they developed, such as squash and stretch, anticipation, and staging, which are foundational concepts in animation. The book is not only an instructional resource but also a historical document that captures the essence of the artistry behind Disney animations.

In contrast, the other titles mentioned serve different purposes within the animation field. "The Animation Book" focuses on a more general overview of animation techniques, while "The Art of Animation" primarily showcases artwork rather than providing an in-depth analysis like Thomas and Johnston's work. "Animation Now!" also covers contemporary animation practices, making it distinct in its focus and time period.