To all those who are asking about books to prepare I am sorry I am not sure about that and even regarding eligibility I think fpsc can give u the best answer. Office timings are 9 - 5. sat sunday off. Its a uniform job specially when field work is required but in fbr offices usually inspectors dont wear uniform although they should. Job is tax collection, recoveries etc income tax and sales tax both come under the jurisdiction of inland revenue.

I hope its enough information. Best of luck to all of you.