Application description SCLS on the go!The Somerset County Library System (SCLS) mobile app gives users access to the library’s catalog and their account. Access and download e-books, e-audio and video through Overdrive in one step. Place materials on hold, renew borrowed items, check on upcoming programs, take note of branch locations and hours, even ask a librarian for help! Even better, scan the ISBN bar code of any book in a store and Boopsie will automatically scan the SCLS catalog for the title and place a hold on it if it is in the collection.