CNC) Machining is a method used to perform a wide range of manufacturing tasks, which are all carried out by computerized devices.
You can refer book for CNC Operator by Indian Author.
Book Name-CNC Fundamentals and Programming 2/e PB
Author Name-by Agarwal
Link : http://www.amazon.in/CNC-Fundamentals-Programming-PB-Agarwal/dp/9380358873/ref=pd_sim_14_3?_encoding=UTF8&psc=1&refRID=1A659WT3G442R25265EV