This book is written using vocabulary that is readable and understandable, yet somewhat challenging for young readers in upper elementary through lower middle school. She frequently uses context clues to guide the reader in understanding more challenging vocabulary. She also uses literary devices such as metaphors and similes to add depth and detail to her work. Cliff hangers are frequently used to guide the reader from one chapter to another and to keep a sense of mystery and excitement throughout the story. Foreshadowing frequently takes place throughout the story to add to the sense of danger and to encourage the reader to continue reading.