It's holiday time in the Great Lakes State! Travel with Katie and her cousin to see Motor City, drive down the country's first concrete highway, tour some of Michigan's 115 lighthouses, and ride in a horse-drawn sleigh. She even tries her hand at the state's favorite sport: ice hockey! Goal! On each of the twelve days during her Christmas visit with her cousin Will, Katie writes home describing the history, geography, animals, and interesting sites of Michigan that she has explored. Uses the cumulative pattern of the traditional carol to present amusing state trivia at the end of each letter.