Common Sense Media is an independent organization that provides “unbiased information, trusted advice, and innovative tools to help them harness the power of media and technology as a positive force in all kids’ lives.” Their site is completely searchable from the search bar in the upper right hand corner.
As you can see in the screenshot below, Common Sense Media offers reviews of Movies, TV Shows, Video Games, Websites, Books, Music, and Apps offering detailed information about Positive Messages, Positive Role Models, Violence, Sex, Language, Consumerism, and Drinking,Drugs, &Smoking for each product reviewed. When you hover over each of the reviewed topics, a popup window will give details of the topic within the media. The review then concludes with a statement about the best age for this media.
This information helps parents and teachers make decisions about finding the most appropriate media for the children or students. As you can see in the image below for the novel Bone Gap.