Who authored the books 'A History of Ancient India' and 'A History of South India'?

Q. Who authored the books 'A History of Ancient India' and 'A History of South India'?
Answer: K.A. Neelakanta Shastri
Notes: K.A. Neelakanta Shastri (1892–1975), a South Indian historian, is renowned for 'A History of Ancient India' and 'A History of South India.' His research on Pallavas and Cholas influenced Andhra Pradesh history curriculum; awarded Padma Bhushan, 1954.