Merge branch 'master' of github.com:AllenDowney/ThinkDSP

Author: AllenDowney

README.md

@@ -1,14 +1,18 @@
 # ThinkDSP
 
-LaTeX source and Python code for _Think DSP: Digital Signal Processing in Python_, by Allen B. Downey.
+*Think DSP* is an introduction to Digital Signal Processing in Python.
 
-The premise of this book (and the other books in the _Think X_ series) is that if you know how to program,
-you can use that skill to learn other things.  I am writing this book because I think the conventional
-approach to digital signal processing is backward: most books (and the classes that use them) present
-the material bottom-up, starting with mathematical abstractions like phasors.
+[Order *Think DSP* from Amazon.com](http://amzn.to/1naaUCN).
 
-With a programming-based approach, I can go top-down, which means I can present the most important
-ideas right away.  By the end of the first chapter, you can break down a sound into its harmonics, modify the harmonics, and generate new sounds.
+[Download *Think DSP* in PDF](http://greenteapress.com/thinkdsp/thinkdsp.pdf).
+
+[Read *Think DSP* in HTML](http://greenteapress.com/thinkdsp/html/index.html).
+
+The premise of this book (and the other books in the Think X series) is that if you know how to program, you can use that skill to learn other things. I am writing this book because I think the conventional approach to digital signal processing is backward: most books (and the classes that use them) present the material bottom-up, starting with mathematical abstractions like phasors.
+
+With a programming-based approach, I can go top-down, which means I can present the most important ideas right away. By the end of the first chapter, you can decompose a sound into its harmonics, modify the harmonics, and generate new sounds.
+
+Think DSP is a Free Book. It is available under the [Creative Commons Attribution-NonCommercial 3.0 Unported License](https://creativecommons.org/licenses/by-nc/3.0/), which means that you are free to copy, distribute, and modify it, as long as you attribute the work and don't use it for commercial purposes.
 
 Here's a notebook that previews what you will see in Chapter 1: