A dynamic language is constantly changing, and that change affects everything from spelling, usage, and semantics. Grammar and application do not go hand in hand. Application often permits what grammar calls imperfect. Grammar in any language has been written for a long time. In comparison, the book of enforcement rules is young in age. His journey in English started with the applied dictionary written by the Fowler brothers in the 19th century. Later, many others have nurtured that trend. For a long time there was no code of practice in our language. Subhash Bhattacharya wrote the book Prathon Priya Vidhi. The book created a huge stir with its publication in 1984. Although it is a dictionary in name, this book is actually a discussion book. It is called a dictionary because the arrangement of subjects is alphabetical. The spelling of Bengali language, the light and dark of words, the usage of words are all discussed in it. The depth and wisdom in the discussion is the same. And in each case, the abundance of parables from Bengali literature is also surprising. Nineteen years after its first publication, readers will find new ideas in this delightful edition, fully expanded and revised. This book is a must-read for educated and learning-minded Bengalis of all ages.