Shipping materials via a library courier service is much cheaper than shipping via the U.S. Postal Service. Most library delivery services are regional or state-based. This article illustrates how two separate services combined to development the multi-state courier system COKAMO. COKAMO is moving tens of thousands of items between three states at a fraction of U.S. Postal Service rates. Within one year of implementing the system, over 57,000 items have been shipped, creating savings of over $215,000 for participating libraries. Significant changes in the behavior of interlibrary loan staff throughout the region are evidenced in statistics which show an increase in borrowing between participating states and a decline in interlibrary loan to adjacent states not in COKAMO.