Minor key, features the 1st appearance of the Triumvirate of Terror.
Papers publish Black Widow having escaped with secret plans. An upset Hawkeye gets tricked by the Mad Thinker, and is subsequently captured by Hammerhead, part of the Triumvirate of Terror. The Wasp and Goliath try to rescue but are also captured by Thunderboot, another part of the Triumvirate. The Mad Thinker proceeds to try to steal Tony Stark's inventions, but his plans are thwarted by Hercules who rescues his fellow Avengers. The Mad Thinker manages to escape however.
Very Fine comic assessed at around 7.0. Cream to off-white pages, tight copy which lies flat. All comics listed are complete unless specifically stated otherwise. Affordable early Silver Age issue of the Avengers.