On 18 July 1925, Hitler’s book, Mein Kampf (‘My Struggle’) was published. He wrote it in prison, where he was serving a sentence for a failed coup he attempted in 1923.
In Mein Kampf, Hitler wrote about his ideology and presented himself as the leader of the extreme right. He talked about his life and his youth, his 'conversion' to antisemitism (the hatred of Jews) and his time as a soldier in the First World War.
He raged against the Treaty of Versailles and the reparations that Germany had to pay because of the Treaty. He did not believe in parliamentary democracy. Mein Kampf is full of racist ideas and hatred of Jews and communists.
In Mein Kampf, Hitler also wrote a lot about the future of Germany. He wanted to expand the German territory in Eastern Europe and to throw the Jews out of Germany, since he believed they threatened the survival of the German people. Although Mein Kampf does not refer to the later mass murder of Jews during the Second World War (the Holocaust), it does show that he had already developed a hatred of Jews at this time.