The three sets of 12 books that comprise Trilogy (I Got Up, I Went, and I Met) document three events happening daily in the life of Conceptual artist On Kawara: where he awoke, where he went, and whom he met. The 36 books compile these particular details for twelve years as the artist traveled around the world. Each set of books was published in a total edition of 100 copies, including 90 copies for sale and 10 A.P. copies. The twelfth volume within each of these three sets is numbered 89/90 and is initialed by the artist on the colophon.