Harry Potter and the Prisoner of Azkaban (Harry Potter, #3)

by J.K. Rowling

Extremely unusual though he was, at that moment Harry Potter felt just like everyone else — glad, for the first time in his life, that it was his birthday.

“Dementors are among the foulest creatures that walk this earth. They infest the darkest, filthiest places, they glory in decay and despair, they drain peace, hope, and happiness out of the air around them. Even Muggles feel their presence, though they can’t see them. Get too near a dementor and every good feeling, every happy memory will be sucked out of you. If it can, the dementor will feed on you long enough to reduce you to something like itself . . . soulless and evil. You’ll be left with nothing but the worst experiences of your life. And the worst that happened to you, Harry, is enough to make anyone fall off their broom. You have nothing to feel ashamed of.”

Never forget that when thirteen dine together, the first to rise will be the first to die!”