Narwhal on a Sunny Night

When the magic tree house whisks Jack and Annie to Greenland, they're not sure what time they've landed in, but they immediately know what their mission save a narwhal! Then they meet a young hunter named Leif Erikson and they ask for his help. But Leif has other ideas...Track the facts with Jack and Annie in the nonfiction companion to this Narwhals and Other Whales