Grapefruit is an artist's book written by Yoko Ono, originally published in 1964. It has become famous as an early example of conceptual art, containing a series of "event scores" that replace the physical work of art – the traditional stock-in-trade of artists – with instructions that an individual may, or may not, wish to enact.
"Grapefruit is one of the monuments of conceptual art of the early 1960s. She has a lyrical, poetic dimension that sets her apart from the other conceptual artists. Her approach to art was only made acceptable when [people] like Kosuth and Weiner came in and did virtually the same thing as Yoko, but made them respectable and collectible."
