It is easy to publish books if you write it for some university. Universities publish books for educating masses. so if you can write books on such topics,you can write it and get it published. But if you want to make money, this route will not help.
ashok567's Life List
I am talking about carrying out research work to get doctorate. If you have registered yourself that is not over. You should work and study. You may fail quite often. You may not get new ideas. It seems as thoughall avenues are already explored. Then keeping oneself motivated is a big task.