MPNEBOOK
Limited appeal to most and I considered posting this in the forums, but MS is doing an on again, off again discount on their e-books. So if you look to the darker, cooler months and think its time to learn new tricks, it's possible that some of these e-books will help you at 50% off.
Prices seem to be in USD and I don't know if there is an expiry date.
Good deal for your first MCP book,
I log in to the MCP portal, it always has this deal on.