And so, the 9th edition of Carlos Correia's financial management textbook became available as a free PDF, with the added protections that Carlos had requested. The response was overwhelming – readers from all over the world downloaded the document, and the feedback was glowing.

As he pored over the pages, he couldn't help but think about his journey as a financial expert. Carlos had always been passionate about helping individuals and businesses make informed financial decisions. He had spent years researching and teaching financial management, and his textbook had become a staple in many business schools.

Carlos smiled, relieved. "That's a great solution, Sofia. Let's do it."

But then, Carlos noticed something that made him pause. The document was labeled as a "free PDF" version of the 9th edition. Carlos's heart skipped a beat. He had worked tirelessly to create a high-quality textbook, and he was concerned about unauthorized distribution.