Wait, what? Why would you read the whole thing three times? Even if it's all about memorization, there are much better methods. The one I recommend is making summaries, preferably chapter by chapter (or other bite sized chunks). Don't just go wild with a highlighter, write the important things down. Carefully, neatly. That alone will help you remember the important parts. And no0t only that, it will force you to make connections, adding more context to the things you're trying to learn. Once you have your summary, you can read it as many times as you want/feel the need to. As a bonus, your neat summaries will help you become popular among classmates! (Well, maybe. The whole learning aspect of it works, though.)
I always wrote mine with a fountain pen, and if a part of the summary didn't look quite right, I'd write it again. I think that really helped my brain figure out that I was trying to make it store something important.