I'm purchasing some of the extension titles for my DS8 to read alongside his Bigger studies. He's a strong reader and loves to read. Are there any titles I should avoid for a younger reader? He'll be 8.5/9 throughout his Bigger year. I won't purchase the science book b/c he doesn't need the extra science and it's definitely a more challenging text. I think it is used later on in another guide anyway

Another question is regarding A Child's Story of America. Is there any inappropriate material for a younger reader? I read a review on Amazon that said there was some explicit comments made about Bill Clinton and his lifestyle choices. Not sure if that review is accurate or not

Thanks so much!!