Chunk it down with purpose. You want to connect what you learn with easy memory access. That means have a focus what you're going to learn / activate each layer and see to it that you hook it to your memory web.
Review your mind maps and test your memory in the weeks prior to exams. That way you can refresh what you drop from your easy memory access.
While textbooks cover a lot exams won't be on all of it. Get hold of old exams and test yourself with them. That will show you what you need to activate from the textbooks as well.
Alex