The Canvas Pocket Reference is a short read, aimed at introducing the canvas DOM element, and the way that it can be used. Additionally it provides a reference to the APIs, useful for people actually using canvas in anger.
HTML canvas is a powerful tool, bringing a rich drawing API to browsers. There is a strong argument for why this is a limited tool, with it’s lack of scalability, but it is nonetheless useful. It is possible to perform many of the simple transformations and drawing tools required for graphing charting and simple image manipulation.
The tutorial provides enough information to get started, whetting the appetite, and the details provide a decent reference. These combined with Dive into HTML5, the Mozilla Developer Centre and a little bit of googling, are all that you will need to get into the world of canvas.
[this book was reviewed as a part of the O'Reilly Blogger Review Program]