The Foundation Trilogy by Isaac Asimov (Equinox/Avon Paperback Edition)

This is a vintage trade paperback edition of Isaac Asimov's seminal science fiction work, 'The Foundation Trilogy,' published under the Equinox imprint by Avon Books. The cover features a distinctive black background with graphic, stylized surrealist artwork depicting 'Foundation' and 'Second Foundation' in geometric prisms. Based on the price marking of $4.95 and the Equinox/Avon branding, this copy likely dates to the late 1970s or early 1980s. The physical condition is poor to fair; the front cover exhibits significant structural damage, including a large triangular piece missing from the right edge and a major horizontal tear across the bottom third that has been partially and crudely repaired, possibly with old adhesive or simply folded back. There is visible edge wear, chipping along the spine, and creasing throughout the cardstock cover. The paper edges show signs of oxidation and toning consistent with age. Despite the classic cover art, the severe physical degradation, including the loss of cover material and deep vertical creases intersecting the text and imagery, significantly impacts its collectible value as a mint-condition specimen.