Asimov, Isaac. Triangle. Garden City: Doubleday Science Fiction, 1961. First Edition Hardcover. Condition (Book/DJ): Very good / Good. Pages are tight, with a bright and clean interior. DJ is very good aside from the burn mark on the middle of the front cover.
Three complete Asimov novels, featuring the entire Trantorian Empire series, are published in this omnibus, Book Club Edition, work. The BCE came out one month earlier than the Trade copy in 1961 (source: ISFDB). The three individual works by Asimov are 'The Currents of Space' (1952), 'Pebble in the Sky' (1950) and 'The Stars, Like Dust' (1951). Included is an author signed letter that is on a loose sheet of paper.