Natalie and Annie decide to put their detective skills to use as they open the E & O Detective Agency to solve neighborhood mysteries. Together they stumble across an incredibly intriguing one when Mrs. Warsaw, their elderly neighbor with memory problems, begins spreading news about a woman named Zina Zeolite hiding in her bedroom closet. Mrs. Warsaw often speaks of seeing strange things so Natalie doesn't believe her. But Annie insists that they take the case.<p>As the detectives start investigating, Natalie and Annie discover that Zina Zeolite is the name of the world's first female comic book superhero. But could Zina Zeolite also be a real person? And what does a superhero have to do with the ailing Mrs. Warsaw? <p><p>The girls must band together to help Natalie win her school election, solve this mystery, and stay friends.<p><p>Praise for ELVIS & OLIVE:<p>"Watson's debut is a solid exploration of friendship and self-confidence themes that are so important to middle-grade girls." -- BOOKLIST<p><p>"Watson has penned a satisfying friendship story with drama and humor in fine balance." -- KIRKUS REVIEWS<p>