Siberia’s provenance is highly organic—Ferrara describes the script development as “starting off on page one and [letting] your mind take you wherever you’re gonna’ go.” But there is also a source of inspiration in Carl Jung’s The Red Book, a manuscript by the Swiss psychologist that was only published and made publicly accessible in 2009. As Ferrara describes it, The Red Book chronicles the experiences when “Jung would take time to go into his private room at night, alone, and delve into the center of his subconscious—into his dreams, into his mind, and almost write freehand.”