Just the other day I got a really smart portfolio submission. It was a tiny book with artwork, details and bio. I had to check it out as this seems a great way to present ones work in a really professional manner.
Blurb creates a variety of self published books. They are ideal in that you can order just one if that is all you need.
The most affordable option is a 7" x 7" size up to 40 pages. Full color at just $12.95 each.
Might not be ideal for a large runs but great if you want to target a specific gallery or submit a book dummy to a book publisher.