Gregs_Bookcases_d_04.jpg 2 shelves (top and bottom only)
Gregs_Bookcases_d_05.jpg 3 shelves (top, bottom and one centered)
Gregs_Bookcases_d_06.jpg 4 shelves equally spaced
Gregs_Bookcases_d_07.jpg 5 shelves equally spaced