"Enter Sandman" is a song by American heavy metal band Metallica, featured as the opening track and lead single from their eponymous 1991 album Metallica. The song was produced by Bob Rock, and the music was written by Kirk Hammett, Lars Ulrich, and James Hetfield. Vocalist and guitarist Hetfield wrote the lyrics, which deal with nightmares.Enter Sandman：sm3910476Wasting My Hate (Live on BBC)：sm3750391