In 1973 Ralph Gibson published his first photobook, The Somnambulist; he followed up with Déjà Vu in 1973, and Days at Sea in 1974. Together the books form a trilogy which has been credited with re-imagining the modern photobook; all three were published by Lustrum Press, an organisation formed by Gibson to retain creative control of his work. Now more than 150 images from the trilogy – aka The Black Trilogy – will be shown at the Pavillon Populaire in Montpellier, South France.