New York: Second Half Publishing Company, 1958-1965. First Editions. Quartos. Six issues (all published) of the influential magazine founded by sculptor and polemicist Philip Pavia, committed to "catalyze and catalogue" the development of Abstract Expressionism. With contributions—whether textual statements, panel transcripts, or reproductions of works—from the likes of Sam Francis, Helen Frankenthaler, Arshile Gorky, Philip Guston, Franz Kline, Elaine and Willem de Kooning, Lee Krasner, Joan Mitchell, Robert Motherwell, "P.G." Pavia, Jackson Pollock, Ad Reinhardt, Larry Rivers, Milton Resnick, Mark Rothko, Salvatore Scarpitta, Walasse Ting, Mark Tobey, Jack Tworkov, and Esteban Vicente. With adjacent contributions from the likes of André Breton, John Cage, Morton Feldman, Allen Ginsberg, Allan Kaprow, and Piet Mondrian. Thoroughly illustrated in black-and-white, with several color plates. Aside from some minor scuffing to illustrated wrappers, and short edge tear to front panel of issue 5, this set in near fine condition; first five issues in illustrated wrappers, with the sixth in plain wrappers and brown card jacket, printed in black and copper ink. Full sets uncommon, with fewer than a dozen OCLC records located in North America.