Antigravity Heroes by Bryan Davis

Book 3 of Superhero Trilogy

Summary:

In previous stories, our heroes, Eddie and Samantha Hertz, faced earthquakes and hypnotized zombie-like people. What could be worse?

Birds. Yes, birds. And lots of them. Eagles, hawks, owls, herons, and more. The villain Mephisto has hypnotized tens of thousands of them to do his evil bidding.

The situation gets even stranger. Our heroes have to battle gravity itself. Mephisto has stolen antigravity belts that allow him to fly. But the belts have a flaw, and he tries to force Eddie to perfect them. In the meantime, Mephisto uses the hypnotized birds to paralyze the city while he steals millions of dollars.

Against all odds, Eddie and Samantha, their mother, their Uncle Milligan, the new Damocles, and the eccentric Dr. Gilbert G. Godwin, work together to battle the hypnotized birds and their controlling master.

As usual, the entire world is in danger, and only the Hertz heroes can save it.

Opening Lines: 

I stood at the center of the hospital's physical therapy room. Mobile beds lined the walls, all turned so the young occupants could see me.

"Then when the octopus grabbed Sam," I said as I acted out the scene, "it tried to drag her into the moat while she hung on to a tree root with both hands."

The children gasped. Sam, standing next to me and wearing her usual purple shirt and cape, black skirt and leggings, and silver gadgets belt, used sign language to translate for Maddie, a deaf girl who sat propped up in a bed directly in front of us. Maddie gasped as well.