Book excerpt: "As conceived, this history was aimed at satisfying the need of employees of the Central Intelligence Agency, especially new or young professional ones, for a comprehensive and detailed account of the agency's origin. It was completed in 1975, classified SECRET, and reproduced in sets of 2 volumes each. The security classification has recently been reviewed, and the manuscript, shorn of no more than six typewritten pages of material, is now declassified. Thus released for leisurely reading outside the office, and printed in one volume, this history should better serve its original purpose."--Preface.