At the start of the twentieth century, Rainer Maria Rilke wrote a series of letters to a young officer cadet, advising him on writing, love, sex, suffering, and the nature of advice itself. These profound and lyrical letters have since become hugely influential for generations of writers and artists of all kinds, including Lady Gaga and Patti Smith. With honesty, elegance, and a deep understanding of the loneliness that often comes with being an artist, Rilke's...