I didn't buy this one but I do remember seeing house ads for it in other Marvel Comics of the time and of course, I have reprints of it in various volumes here in the man cave. Great art by Jack Kirby. The Avengers line-up undergoes the first of many, many changes that would take place over the years. At the end of this issue, "Cap's Kooky Quartet" is introduced: Captain America, Hawkeye, Quicksilver and The Scarlet Witch. All three new Avengers had begun their careers as criminals. A bold, daring move that produced some pretty good comics over the next year or so.