The graphic vision of Dominic Flandry, Agent of Imperial Terra, was revisited by Michael Whelan in 1979. While totally different from Kelly Freas' style, Whelan gave Flandry a young and adventurous flair.
Below is Whelan's preliminary sketch for the above cover:
Then the art director wrote comments over it:
Whelan then made a full size pencil drawing:
Below is the painting in progress:
Below, the completed painting (acrylics on illustration board):
Below, two more in the series by Michael Whelan:
Really, read these books. They're intelligent fun!