Journeys can be life-changing, whether they are literal—traveling from one place to another—or personal, like the quest for self-discovery. This meditative picture book explores both, following a young child on a train ride from the city to the country. As the landscape transforms from a bustling city to a richly imaginative world in this distinctively formatted book, the child's sense of wonder and independence flourishes, as does a deep engagement with life and the possibilities that lie ahead—making Line 135 a quietly eloquent gift for anyone embarking on their life's journey.