Two covers: Neuromancer by William Gibson

Two covers: The Body Snatchers by Jack Finney

Dell edition, 1955: cover by John McDermott

(I love the tagline: "Was this his woman - or an alien life form?", kind of like 'Mr & Mrs' by way of H.P. Lovecraft)

Dell edition, 1961: cover by Richard Powers

Two covers: We by Yevgeny Zamyatin

Penguin edition, 1980: cover by Adrian Chesterman

Penguin edition, 1993: cover by Anton Brzezinski

Two covers: The War of the Worlds by H.G. Wells

Penguin edition, 1963: cover by Virgil Burnett

Gollancz SF Masterworks edition, 1999: cover by Chris Moore

Two covers: The Stainless Steel Rat by Harry Harrison

Sphere edition, 1974: cover by Eddie Jones

Orbit edition, 1984: cover by Peter Elson

Two covers: Brave New World by Aldous Huxley

Chatto & Windus first edition, 1932: cover by Leslie Holland

Bantam edition, 1952: cover by Charles Binger

Two covers: The Forever War by Joe Haldeman

Orbit edition, 1976: cover by Patrick Woodroffe

Gollancz SF Masterworks edition, 2012: cover by Chris Moore

Two covers: 1984 by George Orwell

Signet edition, 1952: cover by Alan Harmon

Penguin edition, 2008: cover by Shepard Fairey