Parent reviews for Down the Mysterly River

My 12-year-old is currently reading this book and he loves it. He's not a "reader" so that's saying a lot! But, we have been surprised by some profanity... only in a couple of spots so far, but we're only half-way through the book. Common Sense Media reports that there is no "Language" but that is incorrect. This would be rated PG-13 if it were a movie, due to the violence and language. Great read, but be aware.