Some things you can consider:
- The organization and structure
 - The use of figurative language (what purpose does it serve?)
 - Complexity of sentence structures
 - The use of symbols (what are they used for? how are they used?)
 - POV - 1st person, 3rd person, etc.
 - Characterization (indirect, direct)
 - Tone (How does the author feel about this subject? If you're reading fiction, can you detect the tone of the narrator? Does this tone change?)
 
I found some notes that I think might help you with this part of the project - enjoy!
Style Notes