Drishti Combo Of 5 Books Bharatiya Itihas Evam Kala Sanskriti & Bhartiya Samvidhan Evam Rajvyavastha Bhugol Evam Paryavaran- Paristhitiki Indian Economy Samanya Vigyan Evam Prodyogiki Vigyan Prelims Practice Series(HARD BOOK, Hindi, EXPERTS OF PANEL)