Anton Kuen­zle, an author writ­ing under a pseu­do­nym, tells of the extra­or­di­nary covert oper­a­tion which began in 1964 and end­ed on the 23rd of Feb­ru­ary 1965 with the exe­cu­tion of Her­bert Cuk­ers, the infa­mous Hang­man of Riga. Pre­sent­ing him­self as a well-to-do Aus­tri­an busi­ness­man, Anton Kuen­zle, an Israeli and high-rank­ing offi­cer of the Israel Defense Forces and a senior agent of the Mossad (Israel’s CIA equiv­a­lent) embarked on a jour­ney to San Paulo, Brazil, to the fortressed home of Her­bert Cuk­ers, the Lat­vian flight pio­neer and mon­ster respon­si­ble for the death of 30,000 Jews in Latvia. The sto­ry tells of Mr. Kuenzle’s jour­ney and his encounter with Cuk­ers, whom he refers to as the ​‘Deceased.’ It describes how he gained his trust so that the Nazi war crim­i­nal could be led to Uruguay to be trapped, over­pow­ered and ulti­mate­ly exe­cut­ed by a team of five men from the Mossad. Kuen­zle spares few details in describ­ing the bar­bar­ic, cru­el and sadis­tic acts of Cuk­ers. The book includes many black and white pho­tographs of Cuk­ers, his Jew­ish vic­tims and Kuen­zle, (with his face black­ened out so that he can­not be rec­og­nized). Upon his death, Cuker’s blood­ied body was laid in a trunk with a sin­gle piece of paper writ­ten in Eng­lish: ​“VER­DICT: Con­sid­er­ing the grav­i­ty of the crimes of which HER­BERT CUK­ERS is accused, notably his per­son­al respon­si­bil­i­ty in the mur­der of 30,000 men, women and chil­dren, and con­sid­er­ing the ter­ri­ble cru­el­ty shown by HER­BERT CUK­ERS in car­ry­ing out his crimes, we con­demn the said CUK­ERS to death. He was exe­cut­ed on 23 Feb­ru­ary 1965 by ​‘Those Who Will Nev­er For­get.’”