The Department of State electronic publications
The iipdigital.usembassy.gov website hold a dedicated section on the U.S. publications.
All publications are available in English language; some of them are available in other languages.
The "eJournal USA" collection includes a monthly series of publication on society, politics and American culture, both available on the web and in .pdf.
The "Books" section includes a wide collection of electronic books and/or downloadable on a wide series of topics. Among those, there is the "Outlines" series, where the six volumes show in a synthetical way, Geography, Literature, Government, Economy and the Giudicial system in the United States.
A section, the "student corner" collect some useful material for students who are interested to better know the United States.
See examples of recent titles in the column to the right.