Your experience of studying with memory techniques

Hello everyone.
I’m preparing for a biology test. And it’s a real challenging test for me. It’s an exam including molecular biology of lodish and lehninger biochemistry. So I would be really grateful if you could share your story of learning textbooks like these ones with me. I know that it’s not going to be a verbatim memorization. But i should memorize many many things. And if possible say how long does it take for books like these two.