Captain America, Iron Man, and two new Avengers, Shuri and Wiccan, investigate Doctor Doom's sinister castle stronghold when the Super Villain goes missing in this thrilling middle-grade novel!

When the Avengers go to Latveria to investigate the mysterious disappearance of their nemesis Doctor Doom, they brace themselves for a trap. To their astonishment, the villain seems to be genuinely missing. However, while exploring Doom's creepy castle and trying their best to avoid all of its sinister dungeons and traps, the Super Heroes become enmeshed in a plot so devious it could have been devised by Doom himself. Now the two novice Avengers, Wiccan and Shuri, need to save themselves, their friends-and the world! This illustrated middle-grade novel is perfect for young readers who crave the excitement and adventure of Marvel Super Heroes.