How do you write about one of the most notorious dictators in history? If you're Norman Mailer, examining the minds, motivations and motifs of the infamous are regular past times. The Castle in the Forest is biographic fiction, detailing the origins of Adolf Hitler. Weaving fact with fancy, and no clear demarcations on where one ends, and one begins, Mailer recounts Hitler's ancestral backgrounds, up to his birth on to his early teenage years.