New York: Basic Books [1959], 1959. First American edition. Hardcover. Near Fine/Near Fine. 8vo. [5], 6-479, [1] pp. Grey cloth with gold lettering blocked in red on the spine; red topstain. Price of $7.50 on the front flap of the dust jacket. Slater 793. First printing of the first American edition. With card stating "With the compliments of the publisher" laid in. A nice copy of Popper's well-known work in confirmation theory, a classic in 20th century philosophy of science. Jacket with toning to its spine panel and a spot of foxing to its front panel.