academic lines

this photo shows academic lines because the library shelfs are lined with books of knowledge.
1. How well did you follow the rule? i think i could of choose something better.
2. What is the subject (be very very specific)?  the subject is the library book shelves 
3. Is it clear to people looking at your photos what the subject is? yes.
4. If you didn't follow the rule well, what could you have done differently?i could have choose a different photo because the lines don't lead to anything specific