Chapter 19: Elf Tails - Harry Potter and the Half-Blood Prince

Chapter 18: Birthday Surprises - Harry Potter and the Half-Blood Prince

Chapter 17: A Sluggish Memory - Harry Potter and the Half-Blood Prince

Chapter 16: A Very Frosty Christmas - Harry Potter and the Half-Blood Prince

Chapter 15: The Unbreakable Vow - Harry Potter and the Half-Blood Prince

Chapter 14: Felix Felicis - Harry Potter and the Half-Blood Prince

Chapter 13: The Secret Riddle - Harry Potter and the Half-Blood Prince

Chapter 12: Silver and Opals - Harry Potter and the Half-Blood Prince