First up is this issue of Famous Monsters of Filmland from April 1978 featuring the Dark Lord of the Sith himself on the cover. This was the 20th anniversary issue of the magazine that began in 1958 and it's a whopper of an issue at 132 pages.
Star Wars had been released nearly a year previously and was still a hot topic in many magazines. FM takes a look back at the movie in an article entitled 'Lord Darth Vader: Badnik or Merely Misunderstood?' which, (well ahead of its time), points out that he may not be such a bad dude after all.
Being the 20th anniversary issue, a ton of film stars and film makers wrote in and sent signed photos wishing FM all the best. Here's one from Lucas himself and appears to be a behind the scenes shot from the movie.
There's also an abundance of Star Wars related ads including a fantastic one for the Kenner figures which I've never seen before.