This practical manual, authored by Francine Lévy-Ranvoisy, provides a structured approach to using drawing as a communication tool for non-literate populations. Focusing on the technique of orthogonal perspective, the book offers a systematic method to convey complex information visually, bypassing the need for written language. Published by Karthala, it serves as a valuable resource for educators, social workers, and development professionals working in diverse linguistic environments. The guide emphasizes clarity and accessibility, ensuring that visual messages are universally understood regardless of the viewer's reading ability.