Mark has created a truly practical guide to film effects compsiting in the least-expensive and arguably most feature-packed compositing application available. Yours Truly contributed a chapter on training your eye.
There are books that will learn you After Effects, and there are books that claim to learn you film compositing. If you put them all in a blender and let the juices ferment under the heat of a thousand suns, you would have a snifter full of Adobe After Effects 6.5 Studio Techniques.
Preorder now before rabid fans tear my chapter out of all existing copies like the Britney Spears photo spread in Rolling Stone that one time.