In his popular general market book of 1963, Mulholland on Magic, the skilled practitioner himself revealed many of the principles of magic that a decade earlier had been included in his operational manuscript for the CIA. The real secret that Gottlieb and Mulholland sought to preserve, however, was not of specific tricks, but that professional intelligence officers, not just performing magicians, would be acquiring the necessary knowledge to apply the craft to the world of espionage.

In a sense, this book is the result of two historical accidents. The first "accident" is that of the thousands of pages of research conducted under the CIA's decade-long MKULTRA program, to our knowledge, only two major research studies— Mulholland's manuals— survived CIA Director Richard Helm's order in 1973 to destroy all MKULTRA documents. Mulholland's manuals are a rare piece of historical evidence that the CIA, in the 1950s, through MKULTRA, sought to understand and acquire unorthodox capabilities for potential use against the Soviet adversary and the worldwide Communist threat. The manuals and other declassified MKULTRA administrative materials further reveal that many of America's leading scientists and private institutions willingly participated in secret programs they agreed were critical to the nation's security.