Mermin is finally getting used to life on dry land when he is discovered by a duo of amateur paranormal investigators and, to make matters worse, Pete and the others discover the truth about who Mermin really is.

Lunella and Devil meet Spider-Man, try to keep the peace when Manhattan freezes solid (and they meet Thor!), team up with younger versions of Lunella's parents and grandparents while trying to fix the Omni-Wave projector without erasing themselves from history, and then Devil is on his own when Lunella gets stuck in class.

Tony Stark, Victor von Doom, T'Challa, Amadeus Cho...the greatest minds in the Marvel Universe all have one thing in common: they're not smarter than a 4th grader! That's right, the rumors are true - Lunella Lafayette is the smartest there is! Now it's time to put her unrivaled intellect to the ultimate test. Thankfully her best friend, Devil Dinosaur, is thirty feet of mutated prehistoric muscle, making for the perfect combination of brains and brawn!...

When Squish, a meek amoeba who loves the comic book exploits of his favorite hero, "Super Amoeba," starts feeling sick, he worries he has caught a deadly illness.