The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Jack and Annie head back in time to Venice, Italy in the 1700s. With the help of a research book, a book of magic rhymes, and a set of mysterious instructions from Merlin, the heroes will save the beautiful city from a flood! Formerly numbered as Magic Tree House #33, the title of this book is now Magic Tree House Merlin Mission #5: . 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 books Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures