I needed a GMC repair manual and originally intended to buy a normal book. Later, I found that there was an electronic version of the repair manual on fastfixdb.com, so I decided to buy it. It took less than half an hour from order to electronic book.Then I looked through the electronic repair manual, which was exactly what I needed. I was impressed the shopping, that is, it was faster and faster than I could imagine. Secondly, the quality of the book was more convenient and clearer than a normal book.