The Codominium Headquarters - The CoDominium Universe (also known as the Empire of Man Universe) of Dr. Jerry Pournelle is a “future history” series of novels and short stories about an alliance between the United States and the Soviet Union.

Project Gutenberg - this site contains several Piper stories that are in the Public Domain.

Zarthani.net - This site is dedicated to the works of H. Beam Piper.

The Jack Vance site - Jack Vance, though largely unknown, is one of the greatest writers of the 20th century. He is the author of over 60 books.

WarWorldCentral - The new web site from John F. Carr, detailing past stories and the new adventures on Haven (War World).

War World is a science fiction shared-world series created by Jerry E. Pournelle and John F. Carr, which takes place in Jerry Pournelle's CoDominium and Empire of Man future history.