Star Wars: The Annotated Screenplays

Star Wars: The Annotated Screenplays contains the scripts for A New Hope, The Empire Strikes Back and Return of the Jedi (including Special Edition changes). This book is unique in that it includes information on how earlier drafts of the scripts differed from the final versions. The book also includes comments from George Lucas, Lawrence Kasdan and other individuals responsible for creating the movies.

Publisher's summary
Luke Skywalker was Annikin Starkiller.

Han Solo was a "huge green-skinned guy with no nose and large gills."

And Princess Leia had a bit part.

Here, at last, is the definitive Star Wars script collection—all three full-length screenplays, presented with the secrets that led to their creation!

Through hours of exclusive interviews with George Lucas, Lawrence Kasdan, Irvin Kershner, and others involved in crafting the original trilogy, Laurent Bouzereau has uncovered the complex process through which life was breathed into the legendary Star Wars saga. Then, by exhaustively annotating the actual scripts, he reveals the fascinating tale behind each step in the evolution of these blockbuster films.