Johan van der Keuken's book explores his career in photography, focusing on his early work capturing youth. "Wij Zijn 17," first published in 1955, features portraits of his friends and classmates, offering intimate glimpses of post-war Dutch teenagers. The evocative theme of youth is presented through Van der Keuken’s lens as a seventeen-year-old. Concurrently, a Japanese edition release of the book accompanies "Les Copains," which includes prints of the uncropped negatives from "Wij Zijn 17," allowing readers an expanded perspective of the subjects and their settings. This project underscores his personal and artistic journey.