For nearly 50 years Japanese-born artist On Kawara (1932–2014) devoted himself to a quiet practice of marking time, incrementally, via various methods and media. He is best known for a continuous series of monochromatic canvases, collectively titled Today, upon which each work’s date of execution is painted in precise white script. This book marks the long-term exhibition of the Today triptych Moon Landing (1969) at Glenstone Museum. It includes text by E. B. White, an original essay by Lynne Tillman, installation photography and reproductions of all additional works by the artist in Glenstone’s collection.