He wrote a book about his adventures in the jungle. He wrote a book about jungle adventures. He wrote a book about the American Civil War. He wrote a book based on an idea which he borrowed from his wife. He wrote a book on China. He wrote about his exam preparation. He wrote about this strange experience in a book. He wrote a fine description of what happened there. He wrote a fine preface to the play. He wrote a letter. He wrote a letter dealing with the matter in all seriousness. He wrote a letter in English.