The other minister -- Spinner's end -- Will and won't -- Horace Slughorn -- An excess of phlegm -- Draco's detour -- The slug club -- Snape victorious -- The Half-Blood Prince -- The House of Gaunt -- Hermione's helping hand -- Silver and opals -- The secret riddle -- Felix Felicis -- The unbreakable vow -- A very frosty Christmas -- A sluggish memory -- Birthday surprises -- Elf tails -- Lord Voldemort's request -- The unknowable room -- After the burial -- Horcruxes -- Sectumsempra -- The seer overheard -- The cave -- The lightning-struck tower -- Flight of the prince -- The Phoenix lament -- The white tomb.