Saint-Exupéry dedicated two books to him, "" ("Letter to a Hostage") and "Le Petit Prince" ("The Little Prince"), and referred to Werth in three more of his works. At the beginning of the Second World War while writing "The Little Prince", Saint-Exupéry lived in his downtown New York City apartment, thinking of his native France and his friends. Werth spent the war unobtrusively in Saint-Amour, his village in the Jura, a mountainous region near Switzerland where he was "alone, cold and hungry", a place that had few polite words for French refugees. Werth appears in the preamble to the novella, where Saint-Exupéry dedicates the book to him: