I haven't tried to download this section but if you go onto the web page for books, it is:
http://www.theguardian.com/books
rather than:
http://www.theguardian.com/culture/books/
Similarly I wanted the Tech section but I see that is in fact now called Technology.
Edit: I have taken Paddy's file from the post above and added 2 book sections. It is very rough and ready code but produced lots of book section stuff.