Do the sections in the documents correspond to sections in the book?
No.
The section numbers in the documents are completely unrelated to the section numbers of the book.
Where did you get the examples from?
Some of them I got from the course textbook.
Others (most of them) I just made up.
Are you sure that everything in these documents is correct?
If you think you've found a mistake in the documents, I implore you to let me know by e-mail.
How did you make these visually splendid documents?
LaTeX, of course.