The product is a sheet music songbook containing piano scores of George Gershwin's Preludes, published by New World Music in the United States in 1926. This advanced level collection specifically focuses on musicals and classical genres, making it a valuable resource for pianists looking to delve into the musical compositions of Gershwin. The study score format allows musicians to engage with the intricate melodies and arrangements, providing a detailed guide to performing these timeless pieces for the piano.