Best selling games?

[coderanger]

I got this list of the best selling games for the week ending Oct 11 via Kotaku:

1. Spore
2. Nancy Drew: The Haunting of Castle Malloy
3. Warhammer Online: Age Of Reckoning
4. Civilization IV: Colonization
5. The Sims 2 Apartment Life Expansion Pack
6. WoW: Battle Chest
7. The Sims 2 Double Deluxe
8. World Of Warcraft
9. Brothers In Arms: Hell's Highway
10. Crysis Warhead

WTH is with #2? The rest I recognize but I've never even heard of a Nancy Drew game before.