Rating downgrade

According the Horn Book Blog, Akashic Books is releasing a G-rated version of their best-selling humor book Go the [Expletive] to Sleep entitled Seriously, Just Go to Sleep. This confuses me. My mom once told me about a gag book called The Wit and Wisdom of Spiro T. Agnew, which was, of course, filled with blank pages. This sounds like the equivalent of re-writing that book to contain the actual musings of Spiro T. Agnew.