Contemporary Issues in Intelligence Gathering by Jonathan Zittrain (2017)
This 11 chapter casebook refers to each chapter as 1 Day. It is completely free to use and available online. it is hosted by H2O. H2O offers a platform for making and sharing open-licensed casebooks and other course materials online. It was created originally by the Berkman Klein Center for Internet and Society. It's developed and maintained today by the Library Innovation Lab at the Harvard Law School Library.