CALI® eLangdell® Press publishes open, non-DRM books for legal education at http://elangdell.cali.org.
We offer the books' content without DRM, for free, with a Creative Commons license at the eLangdell site. As a result, you certainly could print your own from PDFs.
But we've created this Lulu store for easy, inexpensive printing of a higher quality, bound version of our books.
CALI does NOT take a cut of what you pay Lulu.com for their services and LuLu has a liberal return policy that allows for exchanges if you are unhappy with the print quality of your book.
Don't forget to check out http://elangdell.cali.org to download the digital versions for free.