What is the Content Book Rating System? CBRS is a not-for-profit, free content rating system exclusively for books. Over the years, much effort has been put into rating movies, television shows, and music, yet somehow books have been largely ignored. The CBRS was created to make a simple to understand, free system to protect children and sensitive readers from inappropriate content. Additionally, it helps parents and educators make better-informed decisions on what books their children read.


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