Eighteenth Century collections online This link opens in a new windowEighteenth Century Collections Online (ECCO), Parts I and II, comprises over 200,000 printed volumes. It includes every significant English-language and foreign-language title printed in the United Kingdom in the 18th century, thousands of important works from the Americas produced in the same period, along with contemporary titles that debate and analyze those works. This resource is being supported through collaborative efforts between the KU Libraries and the School of Law.