i have done mba in 2010 and working with a automobile company as a hr executive.please suggest some stuy material which would assit me.

i wana go in administration but i coudnt find the time for extra study due to my busy and hectic schedule.so i need some perfect study material for pcs exam.i cant join any coching institude.if i got the perforforma and level of this exam. so i can able to access for pre exam...