It's Marnie Blue's first day at Lady Sealia Foam's Mermaid School, and she's terrified. What if she can't make friends? What if she has to ride a seahorse? And what if the teachers assume she's just like her Aunt Christabel, a famous singer who was a troublemaker growing up. Even though Marnie is sweet and tries her best to fit in, a mermaid named Orla seems intent on getting her in trouble. But when Orla finds herself in danger, Marnie has to swim to the rescue Filled with fabulous, fishy fun, Mermaid School is the start of a sparkly new chapter-book series that's sure to enchant young readers.