The Star Wars Storybook is an adaption of the first Star Wars movie (i.e. Episode 4) for kids, published by Scholastic Books in 1978. It is chock-full of stills from the movie including several that didn't make it into the final cut of the film. I ordered it through my school for $1.50 and it arrived in my eager little hands on 22 February 1979. About thirty years later I brought it out of storage for my son, who has become the resident Star Wars fan in the household.
Kid-friendly robot pals grace the cover.
A sample page showing text and stills.
A great shot of Darth Vader on the back cover.