In his acclaimed book Elevator Music: A Surreal History of Muzak, Easy-Listening, and Other Moodsong, author Joseph Lanza explored the forbidden beauty and social importance of an otherwise shunned musical category. Now, in Easy-Listening Acid Trip, he pushes the boundaries further by taking his subject into altered states, showing how psychedelic pop (as opposed to the ear-grinding jams of 'acid rock') offered other worlds and strange sounds that took listeners through a mind-bending time travel back to vaudeville, Tin Pan Alley, British Music Hall, and the melodic traditions that made songs hits before your grandmother was born.