McDonald’s approach was a simple one, ""if you can’t beat them then join them. Use that same technology to impress the customer enough they will want to buy the compact disc"", as he once said in a famous radio interview. He used the music to sell his technology and not the reverse that tended to be normal operation, and to keep costs low he distributed the disc exclusively via his own company and restricted sales only to on-line (internet) retailers. This approach may have slowed the sales of the project, but it allowed a more profitable distribution and manufacturing model. Polishing of Metal was, for its time, the most advanced E-book ever made and the first on this subject matter. It showcased many unknown acts while demonstrating some of the latest techniques in publishing and multimedia technology. It once and for all sealed the gap between the entertainment and electronics industries. On August 12, 2007 it was inducted into the UNESCO "Great Library of Alexandria" (Bibliotheca Alexandrina).