The third installment in our 7-Day Book Covers Challenge is “Mutations.” This singular book was produced by groundbreaking Dutch “starchitect” Rem Koolhaas and the Harvard Project of the City. “Mutations” is a highly-visual survey and atlas of urbanization and architecture and its impacts as part of the hyper-accelerated growth of mega-cities around the world.

The hefty tome is filled with photography, illustrations and data-visualizations, but it’s also a collection of essays and analyses. “Mutations” is a gripping, thick volume with a book cover that has a distinct physical quality — It’s made of yellow vinyl and neoprene-like fabric. This is the type of coffee-table book that you can easily get lost in for hours and hours on end.