Answer
Metallica's lead singer, James Hetfield, was an avid reader of The Lord of the Rings by J.R.R. Tolkien, which significantly influenced his songwriting. Themes of resilience, battles against darkness, and the search for inner strength find resonance in Metallica's music, notably in songs like "The Unforgiven," "Nothing Else Matters," and "Enter Sandman," where the lyrical imagery draws inspiration from Tolkien's fantasy world and his exploration of overcoming formidable obstacles.