 The most comprehensive analysis of Wałęsa's possible collaboration with secret police was provided in a 2008 book The SB (Służba Bezpieczeństwa; secret police) and Lech Wałęsa: A Biographical Contribution (SB a Lech Wałęsa. Przyczynek do biografii). The book was written by two historians from the Institute of National Remembrance, Sławomir Cenckiewicz and Piotr Gontarczyk, and included documents from the archives of the secret police that were inherited by the Institute. Among the documents were registration cards, memos, notes from the secret police, and reports from the informant.
