Well I haven't really had any classes in the field you are talking about but maybe you could clarify on how much time you have to read these 500 pages, how are they subdivided, how many subjects do they cover, what kind of book it is, how are they related to what you see in class, etc.
Maybe someone could give you some tips/methodology they use regarding this kind of class setting/examination. Maybe it could also help if you give us what kind of preparation you do for your exam. Do you do summaries of these 500 pages, do you try to draw links between what you read and saw in class, etc..