John Peter Zenger overview
http://earlyamerica.com/earlyamerica/bookmarks/zenger/index.html 

Andrew Hamilton's defense
http://www.uark.edu/depts/comminfo/cambridge/zenger.html

Zenger Biography
http://www.encyclopedia.com/topic/John_Peter_Zenger.aspx

The Trial of John Zenger (The Historical Society of the Courts of the State of New York)
http://www.courts.state.ny.us/history/zenger.htm

Books

Alexander, James.  A Brief Narrative of the Case and Trial of John Peter Zenger.  1736. (reprinted by Harvard Univ. Press in 1972, with an introduction by Stanley Katz).

Buranelli, Vincent.  The Trial of Peter Zenger. 1957.

Cheslaw, Irving.  John Zenger and His New York Weekly Journal.  1952.

Colden, Cadwalder.  History of William Crosby's Administration as Governor of the Province of New York. 1935.

Jarrow, Gail.   The Printer's Trial: The Case of John Peter Zenger and the Fight for a Free Press.  2006. (for young adult readers)

Livingston, Rutherford.  John Peter Zenger, His Press, His Trial, and a Bibliography of Zenger Imprints.  1904.

Putnam, William Lowell.  John Peter Zenger and the Fundamental Freedom.  1997.