Hey!

Some of the books listed below are preferred for preparation

Ap history- Bsl Hanumanthrao,

Modern andhra- Raghunatharao

Polity - m laxmilanth, news paper clipping related to this

Economy- Telugu academy books for both Indian/AP economy.news papers clipping related to this, social economic survey Of concern financial year. Studied main points and budgets of India and ap of that year.

For paper1or prelims round - mainly depends on news paper, daily topics related to polity, geography, economy, awards, seminars, S&T issues etc., and for Aptitude consider rs Agarwal book of Aptitude, nios books of environment.

Also, do forget to solve previous years problems.

Hope I answered your query

Thank you