The old books are still valid because in the words of the old sayings: "Don't re-invent the wheel" and "If it works don't fix it". If you think those sayings a

The old books are still valid because in the words of the old sayings: "Don't re-invent the wheel" and "If it works don't fix it". If you think those sayings are not correct, merely look at the various Hollywood re-makes of hit movies of the past. Almost invariably, the older versions were much better than today's re-makes.