Book Mountain, a relatively small library in Spijkenisse, Netherlands developed in 2012 by MVRDV. Within the raised pyramid are several stacked spaces: Retail, an auditorium, meeting rooms, and commercial offices. These spaces, along with stairs, walkways, and reading areas are all lined with books, giving the appearance of a grand mountain of knowledge.

The interior of the space is lit during the day by sunlight, thanks to the pyramid of windows. The spaces within are comfortable, and feel large, especially when under the wide open sky. Not only is the light system eco-friendly, the building is primarily comprised of recycled materials, from the brick, the wood, and glass to even the bookshelves, which are made of recycled flowerpots.