Despite the issues, Rohan and Aisha were relieved to have access to the book. They began to study and work through the problems, and they found the book to be an excellent resource.

As they began to explore the webpage, they noticed that it offered a free download of the PDF version of the book. However, the website required them to complete a survey and provide their email addresses before they could access the download link. Rohan and Aisha exchanged a skeptical glance, but their desire to get their hands on the book overrode their caution.

They completed the survey and provided their email addresses, and after a few minutes, they received an email with the download link. They clicked on the link, and the PDF version of the book began to download. As they waited for the download to complete, they discussed the pros and cons of downloading a free PDF version of a textbook.

"I'm sure it's fine," Rohan replied. "The book is a popular textbook, and I'm sure the authors or the publisher would want people to have access to it."

Rohan and Aisha felt a pang of guilt for downloading the PDF version of the book. They realized that they had inadvertently supported piracy and undermined the intellectual property rights of the authors.

The download completed, and they opened the PDF version of the book. As they began to flip through the pages, they noticed that the content seemed to be identical to the physical version of the book. The theorems, proofs, and examples were all there, and the formatting was identical.

However, as they dug deeper into the book, they started to notice some discrepancies. Some of the pages were missing, and there were formatting issues. It seemed that the PDF version was not a perfect replica of the physical book.