Here's a breakdown of how this theme plays out in the story:
* Observation: The story centers around Petra and her friend, the artistic and detail-oriented Max, who are both keen observers. They notice seemingly insignificant details that others overlook, which become crucial in deciphering the mystery surrounding the Vermeer painting.
* Deduction: Petra and Max use their keen observation skills to make logical deductions and build hypotheses about the Vermeer painting, its connection to a secret code, and the potential motivations of those involved.
* Collaboration: Petra and Max work together, leveraging their individual strengths and perspectives to unravel the complex puzzle. Their collaboration allows them to achieve more than they could individually.
While there are other themes present in the novel, such as the power of friendship and the importance of following one's passions, the main focus is on how analytical thinking, collaboration, and a keen eye for detail can unlock hidden knowledge and solve intricate mysteries.