The book "Avenue of Mysteries" by John Irving explores the concept that not everything can be easily understood or explained. It suggests that there are elements in life that defy rational explanation and challenge our understanding of reality. This theme resonates throughout the narrative, highlighting the presence of mystery in human existence.

Irving's story unfolds through the experiences of its characters, who encounter moments that emphasize the significance of these unexplainable phenomena. The idea that some things are real, despite lacking logical explanation, encourages readers to embrace the unknown and appreciate the complexities of life.