Your link shows historic use of piracy as a term referring to unauthorised manufacture and sale (ie for profit). It gives no support for using the term for giving away content, nor for simple consumption, against the rights holders wishes - both of these are properly, legally and dispassionately described as IPR infringement.

Even if booksellers in the past had tried to make an emotional attachment between book copiers and pirates I would still find its use in a supposedly unbiased report to be objectionable.