Would you please suggest books to buy for preparation of TNPSC Preliminary and Main Examination ?

As you requires I am here giving you suggest books to buy for preparation of TNPSC Preliminary and Main Examination.

Books for TNPSC Exam Preliminary cum Mains Preparation:

State Board books:
Science Books :
6th to 10th Std, (Additional 11th,12th Botany and Zoology if you have time)

Polity :
11th,12th Political Science

Economy :
11th,12th Economics Books

History
i) Prof.J.Dharmarajan's Tamilnadu History
ii)K.Venkadesan. India Freedom Struggle

Indian Polity
i)Lakshi Kanth - Indian Polity
ii) India Arasamaippu Poti Thervu Kalanjiyam by Dr.Shankara Saravanan

Indian Economy
i) Indian Economy for Civil Services Examinations by Ramesh Singh

Geography
i)Oxford School Atlas
ii)Geography of India by Spectrum Publication

Current Affairs
i)The Hindu, Dinamani,
ii)Competitive Success Review/Civil Service Chronicle/Competition Wizard/Shankar IAS Acadamy's Civilpedia(any one of these magazine)

Science & Technology
i)Science & Tech by Spectrum Publications

Aptitude (50 marks in Group 1 Exam)
i)A Modern Approach to Verbal Reasoning by R.S. Aggarwal
ii)Quantitative Aptitude by R.S.Aggarwal
iii)Objective Arithmetic - R. S. Agarwal

General Tamil Books ( Pothu Tamil )
i)Pothu Tamil Kalanjiyam TNPSC Pothu Tamil Puthiya Pada thittam by Shankara Saravanan

1General English Portion Books
i) First you should cover all syllabus oriented portions of State Board Books 6th - 12th Standards.
ii)Objective General English by R.S. Agarwal