Synopsis: Magic. Mystery. Time-travel. Join Jack, Annie and the Magic Tree House as they travel to the past on a daring unicorn rescue mission--from the #1 bestselling chapter book series of all time! Jack and Annie must rescue a beautiful magical creature—the unicorn. But when they land in New York City during the Depression of the 1930s, Jack and Annie are confused. Where will they find a unicorn in a big city? Formerly numbered as Magic Tree House #44…