LAHORE Renowned gynacologist Prof Dr Rashid Latif has said that the history was changing its course and it was important for youth to give attention to book reading to improve knowledge. He was speaking at launching of sixth edition of his book 'Textbook of Gynaecology here at Royal Palm Golf and Country Club on Saturday. Besides President PMDC Dr Syed Sibtal Hasnain, large number of medical professionals and people from various walk of life attended the ceremony.