While there have been other books about Aldrich Ames, Circle of Treason is the first account written by CIA agents who were key members of the CIA team that conducted the intense -Ames Mole Hunt.- Sandra Grimes and Jeanne Vertefeuille were two of the five principals of the CIA team tasked with hunting one of their own and were directly responsible for identifying Ames as the mole, leading to his arrest and conviction.

One of the most destructive traitors in American history, CIA officer Aldrich Ames provided information to the Soviet Union that contributed to the deaths of at...