The Princess in Black and the Giant Problem by Shannon Hale
In the eighth title in the New York Times bestselling series, the Princess in Black's snow day is interrupted by a giant who poses a big problem.
Princess in Black and her hero friends are enjoying a lovely day in the fluffypuffy snow when BANG! a giant smashes his way through the kingdom. This is too big a job for Princess in Black, Princess in Blankets and Goat Avenger and soon dozens of heroes and pet friends show up to save the day!