An unorthodox new book featuring early work by city planning genius and skyscraper guru Louis Sullivan puts the work of the architectural pioneer in your hands. The best part? It's free. A new publication by Chicago professor and artist Tom Burtonwood, Twenty Something Sullivan, features scans of ornamentation Sullivan designed early in his career, many of which are lost. Arranged around a central spine, the block-like reliefs provide a tactile, three-dimensional way to experience Sullivan's designs, and potentially a new model for preservation and education. The entire project is available at http://www.thingiverse.com/thing:1092050, allowing anybody to download and print out their own copy (the printouts can also be used as molds to replicate the reliefs in Play-Doh).