Ballantine Books is a major book publisher located in the United States, founded in 1952 by Ian Ballantine with his wife, Betty Ballantine. It was acquired by Random House in 1973, which in turn was acquired by Bertelsmann AG in 1998 and remains part of that company today. Ballantine's logo is a pair of mirrored letter Bs back to back.
This picture book is basically in three parts: (1) roots for the film in movie and sci-fi history, (2) a novella-ization of the story, and (3) behind the scenes stories and pics. Only (3) is of real interest and value, I think. Some of (1) isn't convincing as being real inspiration for Lucas and (2) is just unnecessary.