Other readers have suggested this book was poorly edited.
I wonder if it was edited at all.

The bullet lists are off-putting. The prosier text in "The
Big Picture" is no better, being pedantic and laden with
unexplained jargon and dense abstractions that I, at least,
couldn't connect to the programming realities I face every
day. I gave up reading midway through that chapter and will
be returning the book shortly.

It's too bad O'Reilly allowed this book to be published in
its current form, as it hurts the company's reputation. I,
for one, will no longer be quite as trusting of its editorial
judgment in future.