Robert illustrated many magazine articles (The Saturday Evening Post, Good Housekeeping Magazine,
Guidepost Magazine, National Geographic) and more than 1,200 paperback book covers, playing an
important role in the pulp fiction boom in the 1960s and 1970s. His work covers many genres and subjects, from detective novels to thrillers,
Gothic novels, murder mysteries, romance novels and Old West novels.
Robert illustrated more than 40 movie posters (including the James Bond 007 films Thunderball, You Only Live Twice, Diamonds Are Forever, and Live and Let Die; Breakfast at Tiffany's; The Odd Couple; Barbarella; and more recently, The Incredibles). His movie poster illustrations depicted stars such as Sean Connery, Roger Moore, Audrey Hepburn, Walter Matthau, Jack Lemmon, Jane Fonda, Burt Reynolds, Raquel Welch and James Coburn.
Robert also creates gallery-quality paintings from his own imagination and depicting such favorite subjects as alluring ladies, tranquil nature scenes, and Old West scenes (such as the one that depicted John Wayne's character in a scene from the movie The Searchers; that image appears on the cover of the book "Tapestry: The Paintings of Robert E. McGinnnis").