Liber Novus, also known as the Red Book, is a manuscript created by psychologist and philosopher Carl Gustav Jung between 1914 and 1930. Jungs relatives and descendants previously withheld the publication of this significant document in psychologys history. Access to the manuscript was only granted to researchers in 2001. The book delves into Jungs thoughts as he developed his concepts of archetypes and the collective unconscious, which are fundamental in human psychology and manifest in language, symbols, and myths. Jung utilized self-analysis to shape his psychotherapy approach, offering a candid insight into his inner world. Shamdasani regards the Red Book as a pivotal moment in Jungs work, providing his followers with ample opportunities to ponder over his mysterious texts and understand them within intellectual and biographical contexts. In an unfinished afterword from 1959, Jung himself warns that the books content may appear as madness to the casual reader.