Mein Kampf (German: [maɪ̯n kampf], My Struggle) is a 1925 autobiographical book by Nazi Party leader Adolf Hitler. The work describes the process by which Hitler became antisemitic and outlines his political ideology and future plans for Germany. Volume 1 of Mein Kampf was published in 1925 and Volume 2 in 1926. The book was edited by Hitler's deputy Rudolf Hess.

Hitler began Mein Kampf while imprisoned for what he considered to be "political crimes" following his failed Putsch in Munich in November 1923. Although Hitler received many visitors initially, he soon devoted himself entirely to the book. As he continued, Hitler realized that it would have to be a two-volume work, with the first volume scheduled for release in early 1925. The governor of Landsberg noted at the time that "he [Hitler] hopes the book will run into many editions, thus enabling him to fulfill his financial obligations and to defray the expenses incurred at the time of his trial."After slow initial sales, the book was a bestseller in Germany after Hitler's rise to power in 1933.

After Hitler's death, copyright of Mein Kampf passed to the state government of Bavaria, which refused to allow any copying or printing of the book in Germany. In 2016, following the expiration of the copyright held by the Bavarian state government, Mein Kampf was republished in Germany for the first time since 1945, which prompted public debate and divided reactions from Jewish groups.