|A multi-cat boxed set.|
This is a long post because Mark goes into detail about how to do a boxed set at Smashwords. He starts out with examples of how some Smashwords authors have already put together their boxed sets. He then goes on to give instructions about doing multi-author sets.
Panzer says, "I better get some of my cat friends together for a box set!"
If you're interested in doing a box set, tootle over to Smashwords: How to Do Box Sets at Smashwords for Audience Buil...: