Question: How expensive is it to prepare for the CAE exam? Because I´ve seen some books in the bookshop and the prices are high.
Question: How can I improve my reading?
Answer: When it comes to reading, which by the way helps you to improve your grammar and vocabulary as well, I suggest selecting a wide variety of sources, let´s say academic books, novels, magazines and blogs. This way you will get familiar with different styles: formal and informal; and you will learn different types of vocabulary.
Question, a third one: Are you saying that in order to pass the exam all we need to do is watch TV and read books and magazines?
Answer: No. Travelling, interacting with native speakers, watching tv in English, listening to music, reading books...all these things will help you to improve your English skills but there is something missing... You need to do Past Papers.
Doing past papers is an excellent way to practise. If you are at school/ university you will probably find some ESOL past papers in your library but if not, you can always try the Cambridge University Web page for some free samples.