If you're interested in learning more about "Le Livre Rouge" without accessing a PDF version, here are some guides and summaries:
And like most of us, your first instinct is to type: into Google.
Before The Red Book , Jung kept (small personal journals). These were published recently, but scholars often post PDF analyses comparing the Black Books to the Red Book. Search for: "Les Cahiers Noirs de Jung PDF analyse" – you will find free academic papers that quote extensive French translations.