Few people know of the affair Adolf Hitler had with his niece, Geli Raubal. The couple shared a strangely intense, passionate relationship, but it was always dogged by Hitler's intolerance, his chauvinistic attitude to women, and his possessive jealousy.

In 1931, aged twenty-three, Geli Raubal was found dead in the Munich flat she shared with Hitler, his revolver on the floor, and an unfinished letter on the table. Hitler was shattered by his niece's death, and for the rest of his life couldn't speak of her without becoming emotional.

Hitler & Geli is the remarkable and little-known story of the most important relationship in Hitler's life.