A lot of game manuals seem to be there just to tell you how to put the CD in the drive and click install unfortunately. The strategy guide is seen as the real manual. Why get people to fork out £30 for the game and give them a thick manual "free" that most people don't read, when you can make them pay for an extra £10-£15. TW doesn't strike me as that type of game though. I think your supposed to muck around and play with stuff if that's your thing.

Also some games come with a pdf manual on the disk with more info, but don't tell you in the paper manual. Always worth checking to see if there's something there.