A good introduction to the art of horology. However, it is a bit dated as it does not include the methodology used by many contemporary practitioners, such as the use of finger cots, and could use an update on both techniques and equipment. It is clearly tilted towards someone who either has or has access to specific equipment - especially when talking about making replacement parts. Not many people I know have a lathe just sitting around.
Never the less, there is a lot of useful information contained within.