Intelligence and Espionage:
* The New Craft of Intelligence: A comprehensive analysis of modern intelligence practices.
* On Intelligence: A collection of Steele's writings on intelligence issues.
* The Craft of Intelligence: A guide to the principles and practices of intelligence.
* The Phoenix Program: A controversial work alleging the CIA's involvement in covert operations in Vietnam.
Open Source Intelligence (OSINT):
* Open Source Intelligence: Techniques and Applications: A guide to using open source information for intelligence gathering.
* OSINT for Beginners: A primer on the basics of open source intelligence.
* The OSINT Factbook: A reference guide to open source intelligence resources.
Other Works:
* The Truth About 9/11: A book challenging the official account of the September 11 attacks.
* The New American Revolution: A manifesto for political reform.
* The Future of Humanity: A vision of a more peaceful and prosperous world.
Note: It's important to be aware that Robert Steele's work has been the subject of controversy and scrutiny. Some of his claims have been disputed, and his views have been criticized by some as being conspiracy-minded.
It's recommended to approach his work with a critical eye and to be aware of the potential for bias or misinformation.