Prettier Than Napoleon

Good stuff at 2 Blowhards this morning: Friedrich waxes eloquent on the German film "M" and its use of camera space. I'm a bit of a film dilettante, but my first exposure to M, in a freshman history seminar, blew me away. We also had to watch The Cabinet of Dr. Caligari, which I only remember spottily because I was concentrating on flirting with one of the guys in my class at the time. Books on film are just one more category I need to read more of but don't have time - currently my collection numbers one book: Anatomy of Film, which is a great read. Any suggestions on others?