Miss Mackle's class is learning about their ancestors, and everyone just found out that Ida's great-great grandmother sailed on the Titanic-and lived to tell about it.

Miss Mackle decides to take the class on a riverboat ride to help them imagine what it was like to travel on the high seas like their ancestors did. Harry and his friends are so excited-it's going to be the perfect field trip. All aboard! Room 3B is setting sail!

題材貼近校園生活及同儕相處，容易引發學生共鳴，美國School Library Journal推薦Grade 2-3閱讀，一般國小高年級與國中適用。