I have mentioned David DuChemin before and I am going to mention him again because he has just come out with his latest e-book. This is his sixth one thus far. He also has two "real" books out that are very much worth reading. I again want to point out that he does not write dry how-to books or even really good how-to books for that matter. David is out to inspire creativity and story telling. I have not yet read his e-books though I possess two of them presently. But, I have read "Within the Frame", chunks of "VisionMongers," (both of which I could not give a high enough recommendation for) and enough of his blog to feel free in selling you on him in general.
That being said, he has a couple of great deals on his blog that are good for tonight and tomorrow. The e-books are normally a whopping $5 but are even less if you get in on them now. And if you are into photography at all and want to improve without having to dump a fortune on gear then this is the guy to read. His mantra is "Gear is good, vision is better."
Here is the link to the post with the deals.