As a children's librarian, who was a social worker for 20 years, I highly recommend this book, but not for the ages given by Amazon.com. It should read GRADE 4-8 (age 10-14). It is definitely NOT a book for age 4-8.
Each chapter starts with a story of a child encountering a difficult situation (kissing unpleasant relatives, being lured into posing for child pornography, exhibitionists, incest by a father, obscene phone calls, and attempted rape). In each story, the child is supported and helped to deal with the situation. Facts are then given to help young readers understand how to avoid dangers themselves. In spite of the scary nature of the topic, the book is straightforward and positive, about girls and boys finding ways to act with strength to stay safe.