Written by Kimberly King and her son Zack, I Said No! ($8) is based on Zack's real experience. Dangerous situations are illustrated in a practical, but not a graphic, way, and the book offers tots advice about what they should say and do if they ever find themselves in one. After each section, there's a question for adults to discuss with their child. This is best for kids 6 years old and up; it's a little long for much younger kids.