Pet Sounds is from 1966; one year before The Beatles Sgt. Pepper album was released. Pet Sounds also uses various instruments that are played throughout the songs, making for some listening experience. It is one of the best albums ever. The 1999 edition has extra songs and mixes. Some of my favorites are "Wouldn't It Be Nice", "I'm Waiting for the Day", "Sloop John B", "God Only Knows", "I Know There's An Answer", "Here Today", "Pet Sounds", and "Hang On to Your Ego". I also like their SMiLE and Sounds of Summer: The Very Best of The Beach Boys albums.