To dream of reading a book represents ideas, insights, or answers to problems you are considering. Telling yourself what to do to follow an expert advice. Considering all options. An open-minded attitude to new ideas. Reading may also reflect your own experience that you are falling back on to deal with a new situation or problem.
Negatively, reading may be a sign that you have badly preconceived ideas about how to act under certain conditions due to past experiences. Telling yourself to think or act in certain ways to new problems based on old or outdated methods. Controlling yourself or using bad habits for no other reason except because it works. Blindly following bad ideas.
Example: A woman had a recurring dream of a red book. In waking life she her marriage was in jeopardy due to her cheating on her husband. In waking life whenever the topic of her marriage would come up she would always repeat to herself that she was bad and that everything was her fault.