Reeya Rai and the Secret Workshop (Hardcover)

While helping her parents organize items at a museum in Greece, Reeya Rai finds some paintings made by a medieval artist and inventor from India. When Reeya learns that artists sometimes hide secret messages in their paintings, Reeya creates a special color-wheel to study the artist's paintings. In them, she finds clues to the location of the inventor's secret workshop! Unfortunately, to access it, Reeya needs a small artifact currently held by her nemesis, Elsie Acker. Will Reeya find a way to get the artifact from Elsie without alerting Dr. Acker to the workshop's location?