The World's Finest Heroes together at last! Superman and Aquaman defend the skies and the seas in a winning combination of teamwork and friendship. When Black Manta engineers an evil device that creates giant bubbles of ocean water capable of flooding entire cities, they'll join forces and fight as one. In order to save the Metropolis and cities around the globe, Superman and Aquaman will have to solve this Bubble Trouble! An engaging chapter book great for young readers!