This richly illustrated book explores the intriguing world of Leon Spilliaert's interiors and still lifes. In nine thematic chapters, Anne Adriaens-Pannier unravels the "secret alchemy" of his silent spaces, where interiors function as self-portraits in absentia. His austere rooms, tables, and everyday objects reveal an intense inner life. Featuring numerous full-page reproductions, this publication offers a layered perspective on one of the most introspective figures of Belgian modernism.