Coincidentally the thirty one articles put together in this book also span eighteen years. The articles have been arranged in five groups in a natural way, based on the nature of content, length etc.Some are relatively long, others like Article-in-a- Box are short biographical pieces. A few book reviews have also been included , hoping that they may be useful for younger readers.It was a pleasure to write each one of them, paying attention not only to content but also to language.