"M Train" is a memoir by Patti Smith, published in 2015. The book is a reflection on her life, exploring themes of love, loss, and creativity. It is structured as a series of vignettes, where Smith shares her thoughts and experiences while visiting various cafes and places that hold significance for her. In "M Train," Smith also delves into her artistic process and the influence of her late partner, Fred "Sonic" Smith. The narrative is rich with literary references and personal anecdotes, creating an intimate portrait of her journey as an artist and a thinker.