Encyclopedia of Graphics File Formats y James D. Murray and William vanRyper

Why did we write this book? The short answer is that graphics file formats are immortal. Like it or not, data files from the dawn of the computer age are still with us, and they're going to be around for a long time to come. Even when the way we think about data itself changes (as it inevitably will), hundreds of millions of files will still be out there in backup storage. We'll always need a way to read, understand, and display them.