New titles are added during the year. Libraries may subscribe to multiple packets. Libraries are responsible for the contents of their packets. Participants are required to keep circulation statistics. Sample packet lists are available.
Packets rotate every three months among participating libraries.
At least one new title is added to each packet at the quarterly meetings. As of February 2001, packets contained 35-37 titles. New members may join on July 1 of any fiscal year. Libraries are responsible for the contents of their packets. Participants are required to keep circulation statistics.