Monster is the debut studio album by American rapper Killer Mike. It was released on March 11, 2003, via Columbia Records. Recording sessions took place at Stankonia Recording, Flamingo Studios, Tree Sound Studios, Level Heads Studio and Doppler Studios in Atlanta, and at Hood Noize Studios. The album peaked at number 10 on the Billboard 200 and at number 4 on the Top R&B/Hip-Hop Albums in the United States.