Here's why:
* Vocabulary: The book uses a mix of everyday language and more sophisticated vocabulary related to history, art, and religion.
* Sentence structure: Sentences tend to be clear and concise, but some may be longer and more complex.
* Theme and plot: The plot is fast-paced and engaging, but it involves historical and religious themes that may be challenging for younger readers.
However, it's important to note that reading levels are subjective and can vary depending on individual reading skills and prior knowledge.
Here are some factors that could influence a reader's experience:
* Prior knowledge of history, art, and religion: Having some background knowledge in these areas can make the book easier to understand.
* Reading fluency and comprehension: A reader with strong reading skills and comprehension will find the book more accessible.
* Personal interest in the subject matter: Readers who are interested in history, art, or conspiracy theories will likely find the book more engaging.
Overall, "The Da Vinci Code" is a relatively accessible book for a wide range of readers, but it may be more challenging for younger readers or those without prior knowledge of the subject matter.