Wow, I didn't expect so much attention. Thanks everyone.
However the situation is a bit complicated, teachers always finds the "devil in the details" and use them to formuate questions. Also the education in Hong Kong is a bit different. It requires more memorization and retention. They ask the most awkard questions.

Of course i am not hoping for 100% comprehension, which is also unachievable unless you are reciting the book. However i juz want to get the most out of the book, including the details to get a passing grade, in the exam.

P.S. of course i made mind maps, and i will and have reviewed them.

Cheers,
Rudolf