Digital Nature Photography Closeup
Continuing with the reading recommendations, I leave you with this book by Jon Cox, great for novice and intermediate photographers, a very easy to read book, with excellent information and written in "common language" making this book interesting, instead of being a show-off of how much the author knows about photography.
If you want to improve your outdoor photography with a digital camera, or if you are planning on traveling and want to make the best out of it with great shots, I recommend you read "Digital Photography Outdoors: A Field Guide for Travel and Adventure Photographers" by James Martin. It comes with really great and solid information, and will help you a lot in your photography 



