This set gathers together all three volumes of the late, great J.W. Rinzler's massive, comprehensive coffee table books about the making of the original Star Wars trilogy: 1977's A New Hope (or simply Star Wars, as it was once known); 1980's The Empire Strikes Back; and 1983's Return of the Jedi.
The complete set is offered here for $50 off what it would cost to buy the books individually.