Transforms in CSS — Free eBook for learning to code animations

Present information in stunning new ways by transforming CSS elements in two- and three-dimensional space. Whether you’re rotating a photo, doing some interesting perspective tricks, or creating an interface that lets you reveal information on an element’s backside, this practical guide shows you how to use them to great effect.

Eric Meyer is a CSS guru. I belive this is part of the CSS: The Definitive Guide, 4th edition.

great resource