In celebration of the 33rd Anniversary of Star Wars: Episode V - The Empire Strikes Back (1980) I'm hosting the entire book of photos and descriptions from Star Wars: The Empire Strikes Back Portfolio by Ralph McQuarrie.
I do not own these images, but eskimio on Imgur posted them.
There are better scans and better images, but I've never seen a more loving tribute to the book. It really gives you the feel of thumbing through this old art book.
Check out the rest of the images after the jump.