Mein Kampf ("My Struggle") was a book written by Adolf Hitler and Rudolf Hess. Rudolf Hess helped Hitler write the book, but he is not mentioned as an author. The book consists of two parts. The first part was written by Hitler while he was in jail in Landsberg am Lech. He was put in jail after a failed "putsch", in 1923. He wrote the second part after his (early) release from jail. From 1926 to 1930, both volumes were sold separately, at the price of 12 Reichsmark each. In 1930, both volumes were published as one book.