Answer: Charlie and the Chocolate Factory by Roald Dahl is generally considered to be at a 4th to 6th-grade reading level. This means it is suitable for readers aged 9 to 12 years old.
Explanation: The book uses a vocabulary and sentence structure that is accessible to middle-grade readers. While it includes some challenging words and concepts, the context and illustrations help younger readers understand the story. The themes and humor are also engaging for this age group, making it a popular choice for both independent reading and classroom use.