Mermicorns Sirena and Lily are learning amazing magic at school. When they take a field trip to the library, they learn how to make things disappear! Sirena is excited to try some new spells. But turning invisible isn’t just fun . . . it’s dangerous! Especially when you don’t read all the rules first. Are the two friends ready for such powerful magic? The Mermicorns chapter book series is perfect for readers who love magic and adventure in series like Unicorn Academy, Purrmaids, and more.