The book "Sister" compiled by poet Ronu Mavai is one of the best poetry collection. Through this, brothers who do not have sisters, or who do not respect those who have them, what is the pain of not having a sister through this book. It has been told. Why a sister is not only respected by one but also by two families. She is not praised enough. "God, may that era come back. A woman should be considered as the crown of the head. Service should be done in the house of old parents only. may God..... An unknown girl found in the street should be considered as a sister. Mother cow should be tied up at home and served. God bless...” The publisher of this poetry collection is Ankit Kumar Singh, the founder of "Life world community" publication. 30 writers have made their special contribution in this book. This "sister" book of Ronu has brought a huge message to the readers. The language of the presented book is simple and easy. The readers will be able to understand the presented book easily.