I have been planning on overlanding Europe to China for quite a while. The only problem is there is no one book for it. Reading individual country guides is extremely time consuming since a change of plans in one country would propagate out to all the other countries. More over, backpacking with 5 Lonely Planet guides would be crazy. Alas, at last I found this book. It tells you exactly where the silk road is (it is really a network of roads), how to get there and all the points of interests in between. With the book in hand, I can turn to Lonely planet guides for the nitty gritty details of city hopping.
The only draw back I can point to is the lack of coverage on Kazakhstan. This book offers 2 route into China. First route is across Kyrgyzstan from Bishkek to Kashgar. While this is definitely the original silk road, doing this trip involves a 16 hour bus ride on a rickety road cut through the high Pamirs. Not terribly safe nor pleasant. The second route is going across Pakistan and up the Karakorum Highway. Again, this is both a historically accurate and extreme scenic road. Given the current security situation in Pakistan, this is not a great choice either. The simplest and safest route is to go through Kazakhstan from Almaty to Urumqi by train. While all the information could easily be obtained from wikitravel, I feel this book is doing its readers a disservice by nudging them towards the 2 high mountain passes.
All in all I would still highly recommend this book. For a trip this size, having a big picture book is essential. No other book come close in terms of breath and depth on this subject.
Bon Voyage silk roaders.