With a noisy giant crashing around the kingdom, the Princess in Black uses the Sparkle Signal to call ALL her heroic friends together--for the biggest adventure yet.

The Princess in Black is ready for her snowy playdate with the Goat Avenger and the Princess in Blankets. It's a perfect day to build snow monsters and battle them for practice. But just when they're about to wage battle, a huge foot smashes their snow monster. 'SQUASHY!'

It's a giant, and it's smashing everything in its path! The giant is too strong for the three friends, so the Princess in Blankets has an idea: it's time to light the Sparkle Signal and summon help. With a rising crescendo of a plot and a delightfully surprising ending, the latest adventure in the New York Times best-selling series features all the Princess in Black's friends as heroes for the first time.