Carani N. Rao, the author of this book, is a postgraduate in Agricultural Chemistry. He served in the A.P. State Agriculture Department as an Agricultural Officer for 3 years, and then joined the I...view moreCarani N. Rao, the author of this book, is a postgraduate in Agricultural Chemistry. He served in the A.P. State Agriculture Department as an Agricultural Officer for 3 years, and then joined the Indian Bank as an officer. After serving the bank for 28 years, he retired as a Senior Manager. He teaches English, Biology and Life skills, not only to the local students, but also to overseas students, online. He also practises homeopathy.view less