I've just ordered 3 books on RTS programming for 85 $ (I'm cheap so I bought one book used for 4 $). However I ordered the from Amazon.com so I'll probably have to pay 100 $ in customs.
Unfortunately I won't have time to read them before Christmas (If I'm optimistic), but I'm looking foreward to study the finer aspects of RTS programming. It must be more fun than what I'm studying at the university.

btw while we're talking abot rts I ran into this imo amusing joke.