Collects Avengers (1963) #31-40.
*Avengers Assemble! Earth's Mightiest Heroes are back in another mighty MARVEL MASTERWORKS volume of top-notch Silver Age classics! So hold on tight as Captain America, Goliath, the Wasp, Hawkeye, Quicksilver and the Scarlet Witch battle the villainous Sons of the Serpent, the Living Laser, Ultrana and no less than the scheming Sub-Mariner himself! This one's a packed-to-the-gills thriller — with guest-appearances by Iron Man, Black Widow, Hercules and Nick Fury; the first appearance of Giant-Man-to-be Bill Foster; and the beginning of AVENGERS storyteller supreme Roy Thomas' amazing run! Reserve your copy today, True Believer!
*Source: marvel.com