The twin juggernauts of “White Rabbit” and “Somebody to Love” ensured its place in rock history, but Jefferson Airplane’s 1967 album isn’t just a vehicle for showstopping new singer Grace Slick. Marty Balin lends vulnerable lead vocals to the medieval folk twinges of “Comin’ Back to Me” and The Mamas & The Papas-esque “How Do You Feel,” and “Embryonic Journey” shows off the fluid fingerpicking of future Hot Tuna guitarist Jorma Kaukonen. As playful as its title, Surrealistic Pillow is the sound of campfire love-ins turned trippy and ambitious.