Radicalis has undergone design changes since the first version was made. In the original version, the pages decreased in size (horizontally and vertically) as the viewer proceeded to the book’s center. Once reaching the center the viewer had to close the book, turn it over to view the other half. In the current design the pages decrease in size horizontally only. The pages are connected to form an accordion fold structure. The viewer can proceed through the book in either direction without turning it over.