The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie When Jack and Annie got back from their adventure in Magic Tree House #17: Tonight on the Titanic, they had lots of questions. How many people were aboard the Titanic? Why weren't there enough lifeboats for all the passengers?...