Maxine and her younger twin brothers imagine themselves to be superheroes as they confront everyday problems—like how to retrieve their soccer ball from a grouchy neighbor's flowerbed, rescue a cat from a tree, or persuade their mother to let them have a pet. Their ill-considered ``solutions'' (usually Maxine's proposals) only get them into trouble until, in a last-chapter turnaround, they help police capture two fleeing suspects. Though this British import features a black, female-headed family and women in nontraditional occupations, it's too predictable and silly for its target audience and too long for a younger one. B&w pencil drawings of all the mishaps. (Fiction. 6-8.)