Uses HTTP requests to create a textbook folder containing the textbook's chapters as HTML documents which can be viewed offline in a web browser
[Dir w/ cambridge_books.py]
| cambridge_books.py
│ ...
└───[Textbook-Name]
│ │ [Chapter-1-Name.html]
│ │ [Chapter-2-Name.html]
│ │ [Chapter-3-Name.html]
│ │ ...