The sure fire way is to trust your inner mind to guide you to the right pages more and more. Play with that when activating this book.
Also set a timer at 10 or 15 minute incrememts that warns you that you need to speed up your superreading. Remember the principle of multiple passes.
Your question of wanting spontaneous activation brings an unusual suggestion... Image stream the answer to the questions the teacher asked of you. Draw the answer by image streaming first, it might give you better clues for where to look in the book. It can certainly help with developing trust for guidance from your inner mind.
Alex