Instructions for the Blue Sky Express Kansas-Colorado courier service are linked here. The 39 Kansas libraries that participate in reciprocal lending with 60 Colorado libraries and the University of Wyoming are listed here. To find the shipping labels to send to the Colorado and Wyoming Blue Sky Express libraries, see this page.
Other Colorado courier libraries
Argosy University of Denver no longer sends and receives materials through Blue Sky Express. Items sent to Argosy University must be sent through another shipper.