What is the author's style in Secret Admirer by R. l. Stine?

Secret Admirer is recounted in the third-person and limited perspective. Selena is the main character and the reader is privy to all of her thoughts and conversations. The story follows Selena and her interactions with her friends and her environment. Secondary characters are only focused on when they are in the scene with Selena. The thoughts of other characters are hidden from the reader.