I just read newspapers, magazines, not books yet, selection. However, recent techniques have been revised to form a better learning experience. But if you need or to be able to improve very quickly, follow this plan. http://ayudas.invemar.org.co/web/thehuan/home/-/blogs/10-trung-tam-tieng-anh-giao-tiep-a-nang-uy-tin-nhat