Okay you're faced with books that don't interest you... what's your purpose? Why are you studying it if it doesn't interest you. (Not challenging you asking you to think so you can get in touch with your purpose).
Once you know why you're studying and have a purpose Buckle down and apply the whole system. Create a schedule similar to the 5-day test and build your knowledge by being active as you go through the material. It's important for this stuff that you create mind maps. It helps you to stay focused and gives you something to review when exams come around (That's usually the reason people read books they are not interested in).
The goal is never to know it all. That's impossible and pointless if you're not interested in it. Knowing enough to pass the exam... doesn't take much when you add a little structure to your approach. Which is why I suggest looking at something like the 5-day test.
Alex
