I'm now reading "The Animators Survival Kit" by Richard Williams. Who knew how much thought went into animating a character walking? Not me. This book definitely lives up to its good reviews.
I also just started reading "Directing the Story: Professional Storytelling and Storyboarding Techniques for Live Action and Animation" by Francis Glebas. I have high hopes for this one too. All three of these books include a lot of very helpful illustrations.
I'm also reading (and doing) "Adobe Flash Pro CS6 Classroom in a Book" to learn how to create images for the iPad that move. I'm looking forward to the animation tutorials, but one step at a time.
Each Flash tutorial is supposed to take around 60-90 minutes. They end up taking me a lot longer because I start experimenting, pushing buttons to see what happens, creating my own versions, etc.
One experiment became a slide show of my work, which is now on the homepage of my site. Take a peek! http://www.phylliscahill.com