You may wonder what animation has to do with the mobile user experience. While the art form of animation was once the provenance of animated films and television, it has found its way into the computer and digital user experience realms. Artful animation has all but invaded the mobile user experience field.
– A New Mobile UX Design Material

New book from Rachel Hinman, looking at the UX on mobile. A free chapter is available on Smashing Magazine.

If you like it, you can get the whole book on Amazon.