>>12039101You don't. You either have a problem you're working on and you check the book for solutions, skim over the things that don't give solutions to your problem. do ctrl+f and type a keyword to find the paragraphs about the thing you want to solve.
If you need to pass a test, buy a question bank and skim through the topics you can't answer.
Books are one of the most inefficient ways of learning, their purpose is not to teach in the first place, otherwise the fucker who wrote it would be a pedagogue.