However, we strongly recommend purchasing the official digital edition or buying the physical book and scanning your own reference copy. Not only does this support the preservation of historical design knowledge, but it also guarantees that the colors you see are the colors Wada intended. In design, precision is everything.

: To find a PDF version, you might need to look into digital libraries, online archives, or websites dedicated to design resources. However, be cautious of copyright laws. Some books or excerpts might be available through services like Google Books or Internet Archive, but availability can vary.