Hitchcock Chronology: Before the Fact (1932) by Francis Iles
- Alma and Joan Harrison complete an initial treatment of Francis Iles' 1932 book Before the Fact. Screenwriter Samson Raphaelson then spends the next 5 weeks fashioning the full script for what would become Suspicion. Raphaelson would later recall it as being "the easiest and most pleasant" experience he had working in the film industry.
- Alfred Hitchcock: A Life in Darkness and Light (2003) by Patrick McGilligan, pages 277-8