It's Shelly Siren's first day at a new school, and she is nervous from the tip of her head to the end of her sparkling mermaid tail. How will she ever fit in at the prestigious Trident Academy? Everyone there is so smart and so pretty and so rich. At least she and her best friend, Echo, are in the same class. Join Shelly, Echo, and other merkids of Trident City on their aquatic adventures--as they navigate their friendships and explore life 20,000 leagues under the sea! Aligned to Common Core Standards and correlated to state standards. Chapter Books is an imprint of Spotlight, a division of ABDO.