Harry Potter and the Half-Blood Prince

One: The Other Minister Two: Spinner's End Three: Will and Won't Four: Horace Slughorn Five: An Excess of Phlegm Six: Draco's Detour Seven: The Slug Club Eight: Snape Victorious Nine: The Half-Blood Prince Ten: The House of Gaunt Eleven: Hermione's Helping Hand Twelve: Silver and Opals Thirteen: The Secret Riddle Fourteen: Felix Felicis Fifteen: The Unbreakable Vow Sixteen: A Very Frosty Christmas Seventeen: A Sluggish Memory Eighteen: Birthday Surprises Nineteen: Elf Tails Twenty: Lord Voldemort's Request Twenty-One: The Unknowable Room Twenty-Two: After the Burial Twenty-Three: Horcruxes Twenty-Four: Sectumsempra Twenty-Five: The Seer Overheard Twenty-Six: The Cave Twenty-Seven: The Lightning-Struck Tower Twenty-Eight: Flight of the Prince Twenty-Nine: The Phoenix Lament Thirty: The White Tomb