A 245-page graphic novel by Caldecott Medal winner and New York Times bestselling author-illustrator Dan Santat. Sophia’s father, a marine biologist, was lost at sea when his research vessel sank. At the mercy of investors, the ‘Aqualand’ marine reserve he founded to protect sea life and continue their research is getting slowly but surely turned into a money-making theme park. One day, a strange being in an old fashioned diving suit emerges from the ocean searching for ‘Aqualand’. When they meet Sophia there, it is revealed that the suit is piloted by four friends from the ocean who, having found her father’s journal near his shipwrecked vessel, are wowed by the promise of a safe haven where they can be protected from the dangers of the ocean. Sophia becomes firm friends with these brave little creatures, and in their humorous adventures not only do they help Sophia with her science project, but together they save ‘Aqualand’ and make it into the haven it was always supposed to be.