Biographical information was compiled with the cooperation of Mohamed Abdelnabi, Ambalal Bhatt, Fernando Gamarra and Shozo Ohashi. The book also includes fold-out organizational charts (late 1960s) of the following: American Intelligence Services, Office of Intelligence Research (OIR), Military Intelligence Headquarters of the US, National Security Agency (NSA), Federal Bureau of Investigation (FBI), System of several cover organizations used by the CIA.
Mader had neither a publisher's statement nor a license number. He listed himself as an editor with the address of Dr. Julius Mader, 1066 Berlin W 66, Mauerstr. 66 at. In the book, two detachable cards were involved. The reader could send him corrections and additions as well as more names of CIA agents and other intelligence officials.
Many famous people are listed in this book, including Bill Moyers, Lyndon Johnson, Robert McNamara, and others. A copy of this book without the dust cover has been on display at the International Spy Museum in Washington, DC.
From Who's Who in CIA:
The rulers of the USA are, of course, extremely interested in keeping the mantle of secrecy over their intelligence network. The invisible government shall have neither names nor faces. For this reason the time appeared to have come to demask a first representative selection of leading officials and officers, collaborators and agents of the US intelligence services who are operating on five continents. The result is this book whereby CIA is used as an appropriate synonym for the whole of the US intelligence system.
The book was later reviewed by Art Kunkin of the Los Angeles Free Press in March 1969. The review included excerpts and one of the five organizational fold out charts and can be found here: Hood College, JFK Files
According to Ladislav Bittman of the Czechoslovakian StB, Who's Who was only partly reliable, and was intended as disinformation:
About half of the names listed in that book are real CIA operatives. The other half are people who were just American diplomats or various officials; and it was prepared with the expectation that naturally many, many Americans operating abroad, diplomats and so on, would be hurt because their names were exposed as CIA officials.[2]
Who's Who in CIA was publicized through the early 1990s in the publications Top Secret and Geheim.