My bookshelf has three layers,each layer from left to right stand it up.
The lowest layer of amplifying sub book,on the left is not commonly used,the most right is commonly used.
The middle layer of the semester textbooks put my notebook,also is the most commonly used,also on the left is relatively not often see,right is often see,laptop right close to the bookshelf
Miscellaneous books on top,such as a class of novel magazine
Under the shelves and cabinets,and put no book.
How do you feel,I feel very comfortable