Ron Cobb's Alien
I was just given this book by my neighbor that feature some concept artwork by Ron Cobb. I've mentioned him before here mostly in regards to his political cartoons, but, was also aware he'd done plenty of art department for film.
He'd worked with Dan O Bannon on the original Alien script. He'd been responsible with setting the mood for the film through a series of drawings and paintings. Even these concept paintings display Ron's sardonic wit and lent to the tone of the films characters.