Heinrich Himmler was a Nazi - and his first order of duty - the extermination of the Jews as ordered by the Führer, Adolf Hitler.
His letters will be published in sections in Germany's Die Welt newspaper under the heading, "Insight into the orderly world of a mass murderer."
The newspaper will feature parts of Himmler's personal letters and personal family photos, published for the first time.
The excerpts, which begin publication this weekend, come from roughly 700 letters that Himmler wrote to his wife, Margarete a nurse he called his "dear, precious woman." In later letters, while Himmler was having an affair with his secretary who eventually bore him two daughters, he addressed as simply, "Dear Mommy."
Although the letters do not describe details of his role in the Holocaust, and other atrocities that occurred during WW II, they do reveal the thoughts and words of a "clearly cold, feeling-less, self-righteous bureaucrat" who orchestrated the mass murders of millions of Jewish men, women and children.
For example: In a letter sent to his then-fiancée in June 1928, Himmler wrote to Margarete: "You have to fight with these wretched Jews because of the money...Don't get frustrated over the Jews, good lady — If only I could help you."
Die Welt says he was referring to Margarete selling her share of a private clinic in Berlin to a fellow occupant of the building, who was Jewish.
An Israeli film director, Vanessa Lapa, owned the letters and approached the newspaper three years ago with them. After historians verified authenticity, they were able to be published.
Lapa is expected to debut a documentary on Himmler next month at the Berlin International Film Festival.
The letters were found inside a safe in Himmler's home in Bavaria.
He committed suicide toward the end of World War II.