Первое предложение правильно. Второе:He wrote a lot in books of children. Третье:Lots of people in different countries enjoy reading his fantasy book.Четвертое:He is the author of some well-known novels which are called The Chronicle of Narnia. Пятое:The most famous book of Lewis is The Lion,the witch and the Wardrobe.Шестое:It was translated in English,in Russian in 1978