The resulting biography ("Carl Sagan: A Life") was published in 1999. Shortly after, a review published in "Nature" highlighted the discovery of the leaked information. This led Reiffel to break his anonymity and write a letter to the journal confirming that Sagan's activity had at the time been considered a breach in the confidentiality of the project. Reiffel took the opportunity to reveal details of the studies, and his statements were widely reported in the media. Reiffel's public admission of the project was accompanied by his denouncement of the work carried out, with the scientist noting that he was "horrified that such a gesture to sway public opinion was ever considered".