Are you talking about spontaneous activation? If you are, from my own personal experience, that doesn't happen too often. However, it will become easier to understand if you just PR the book and then after about 24 hours start casually reading it. In that regard, it will be a lot easier topic wise as you won't have to study until your brain starts throwing off sparks. You'll get a lot more Aha! experiences. Than again, this is all from my personal experience. Mileage may vary.
