The Princess in Black and the Science Fair Scare (Princess in Black #6)

It's mayhem at the science fair! A squishy goo monster is a challenge for the Princess in Black -- but luckily some science-loving princesses are on hand to help.

A surprise goo monster makes this a job for the Princess in Black, and the Princess in Blankets is on the scene to lend a hand. But will two masked heroes be enough to save the science fair? A little scientific problem-solving -- and a lot of princess power -- will make the sixth entry in the New York Times best-selling series a smash hit.