Dark Day in the Deep Sea

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!The magic tree house leads Jack and Annie to a tiny deserted island in the middle of the ocean. The brother and sister team are soon rescued by a ship of explorers and scientists who are looking for…a sea monster!Formerly numbered as Magic Tree House #39, the title of this book is now Magic Tree House Merlin Mission #11: Dark Day in the Deep Sea.Did you know that there’s a Magic Tree House book for every kid?Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter booksMerlin Missions: More challenging adventures for the experienced readerSuper Edition: A longer and more dangerous adventureFact Trackers: Nonfiction companions to your favorite Magic Tree House adventures