I need the full book, stat (please)!

After reading this excerpt, I have so many questions! Was Walden really a murderer?Did the way he was raised lead him to commit such a ghastly crime? Was he really a cult leader? What happened in 1963? Who is Griff, and what happened to him? Was he accused of a crime? Were Talullah and Ross only friends, or something more? Lastly, a friend just recommended Whistling from the Graveyard so now I am extra excited about this one!