The latest weekly PC sales chart speaks for itself (this one covers the week of August 3 to August 9, 2008):

1. World Of Warcraft: Battle Chest
2. The Sims 2 Double Deluxe
3. World Of Warcraft
4. Nancy Drew: The Phantom Of Venice
5. Spore Creature Creator
6. Diablo Battle Chest
7. Warcraft III Battle Chest / Blizzard
8. World Of Warcraft: Burning Crusade
9. The Sims 2 IKEA Home Stuff
10. Call Of Duty 4: Modern Warfare

There ought to be a law against buying Nancy Drew (& The Sims) games.