The value of ebooks isn't the content, but that they have specific homework problems or codes which are required to access online assignments. Particularly the

The value of ebooks isn't the content, but that they have specific homework problems or codes which are required to access online assignments. Particularly the latter, giving each student a different code, because otherwise an entire class can share one ebook. Otherwise, most ebooks have pirated online PDFs, and even without those, all the information is readily available in many places online.