He's a Quadrupal Agent

Harry Potter and the Half Blood Prince by J.K. Rowling: "But through all these years, [Dumbledore] has never stopped trusting Severus Snape, and therein lies my great value in the Dark Lord" (Rowling 31).
Snape, we find in the second chapter of the fifth book, remains a Death Eater. We discover in this section why Snape is cruel and prejudiced against Harry. Snape also admits that Dumbledore is a great wizard and we also discover that Narssica, Bellatrix and Snape are planning something for Malfoy that they aren't sure he can do successfully. This chapter lays out the whole premisice of the fifth book and sets the stage for future events.

Epiphany

The Truth About Forever by Sarah Dessen: "'It's the same thing,' I told her.
'What is?'
'Being afraid and being alive.'
'No,' she spoke slowly.... 'Macy, no. It's not.'
It's not, I repeated in my head, and looking back later, it seemed to me that was the moment everything really changed. When I said these words, not even aloud, and in doing so made my own wish: that for me this could somehow, someday, really be true." (Dessen 137).

I absolutely loved this book. It's a romance, but whatever it is still the bomb. Macy, the main character telling the story, experiences one of those epiphany moments that everyone has to face once in their lifetime when she realizes she doesn't need to be afraid anymore. What she was afraid of was showing her joy, or showing her anger. Her boyfriend, Jason, the smartest kid in the world, is a bad influence over her because he doesn't encourage affection; he barely touches her let alone kiss her, and she begins to think that showing any signs of affection or contempt is bad. That's why, when she meets Wes and his catering crew, everything changes.