Literary quiz

[Carol]

Goddlefrood:
> 
> The clues are cryptic, rather than being quotes (excepting the
first). The second, for instance, leads to the song title that those
lyrics come from, and hence the book. The third is the name of the
single referred, leading to the book etc. etc.
<snip>
> 
> 7. Walden - Henry David Thoreau

Carol responds:

Can you explain this one? I didn't understand it at all.

And someone had a "single" in the sense of a hit song called
"Wuthering Heights"?

Carol, curious as to whether you knew these off the top of your head
or did a bit of research