look at the spacing of the 6th book.
note that it is 1.5 line spacing.
note that the spaces between words is double the norm on a processor.
note that the font is slightly larger than her other books.
note the size of the book.
note how quickly you seem to read it.
note that I do the same thing to make my essays look more impressive, it is called padding. It gives me a better grade and makes the damn book more expensive.