Dark Day in the Deep Sea

Jack and Annie continue their quest for the secrets of happiness — secrets they need if they’re going to save Merlin. But when the magic tree house leads them to a tiny deserted island in the middle of the ocean, they’re not sure who needs help more — Merlin or themselves! The brother and sister team are soon rescued by a ship of explorers and scientists. But the crew isn’t looking for the secrets of happiness. The crew is looking for ... a sea monster!

From the Hardcover edition.

• Author
• Mary Pope Osborne, Salvatore Murdocca

• Format
• hardcover

• Pages
• 128

• Series
• Magic Tree House

• Publisher
• Random House for Young Readers

• Language
• english

• ISBN
• 9780375837319

• Settings
• Frog Creek, Pennsylvania

• Genres
• fantasy, fiction, childrens, adventure, magic, juvenile, animals

• Release date
• 2009