To have Drew Struzan create the cover art for a George Lucas retrospective book is not only appropriate, but would have been inexcusable if it had not been drawn by Drew. I'm sure Lucas' later films would have done 'ok' at the box office without Struzan's art promoting it, but those posters and book covers guaranteed an epic and eternally iconic image for Star Wars and Indiana Jones in the history books and viewer's minds.
Below, the beautiful art, sans messy type (although I must admit that the main title gives it the Lucas touch):
And as always, I'm fascinated by comparing the original reference material and what the artist has done with it. This photo of Lucas was pretty strong to begin with: