"En Route" by J.-K. Huysmans is a novel first published in 1895. It follows Durtal, a thinly disguised portrait of Huysmans himself, through a profound spiritual transformation. After investigating Satanism in an earlier work, Durtal experiences an unexpected conversion to Catholicism and enters a Trappist monastery. The novel traces his soul's journey through mystical literature, liturgy, and plainchant, set against the backdrop of ecclesiastical art and atmosphere—mirroring Huysmans's own religious conversion. (This is an automatically generated summary.)