This is an actual screenshot of my gmail spam folder today.
How does a subject header like this get generated?
a) Perhaps there are minions that type spam subject headers, and one of them thought the title to the book was actually “7 hobbies”
b) Perhaps one of those minions thought he was being funny when he intentionally mistyped the book title
c) How might this phrase become generated by a computer? One might assume that a computer would not randomly through this phrase together. But perhaps it draws phrases out from the collective wisdom of the internet. Which leads me to the obvious conclusion that someone else on the internet must have once upon a time typed this phrase. Which brings us back to hypotheses a and b.