Hi, It won't change anything by default. You need to add the layout you choose to the shortcode:
If you were using shortcode add layout="2". For example: [my_google_books_library shelf="4" max = "10" layout = "2"]
If you are using the function just add the variable 2.
E.g: my_google_books_library("4", "10", "2");
Hope this works.