This is a quick update. As of around 6 am today this book had been downloaded nearly 9,000 times since being pubished 15 days ago. It's a great example of the power of viral marketing, because I've done very little directly to promote it. When I have more time I'll write about the process I used, because it may be useful if part of the curriculum you teach entails caampaigning of some description.
Articles on education technology and related topics