Running out of space for books. Designed and created this single block of wood that is very flexible. If you create multiples of them you can have unlimited configurations and other uses. Other than holding books, I have used it as a stool, a small table for food, a ladder, and a projector stand.. nice. It cost me 50RMB for each piece. The Spec’s are simple : the height is double the width. Depth is as deep as your widest book.