Though his work is instantly recognizable to most Americans, his name may not be. Yet Robert McGinnis's paintings have for decades graced many an airport bookrack, and his movie posters (for You Only Live Twice, Thunderball, Barbarella, Breakfast at Tiffany's, and The Odd Couple) are classics of the genre. His illustrations have appeared in magazines as diverse as Playboy, Saturday Evening Post, and Guideposts. His works of fine art reside in major...