Book on Amazon Echo Programming

Announced today: Programming the Amazon Echo, by Joseph Jaquinta.  Technical, yet to be completely edited, can't vouch for it, but only 99 cents on Kindle.  Can at least give you an idea of what is involved and capabilities.  Plan to take a deeper examination.  A look inside the book at the link.   Amazon is now also investing in a developer community for the attentive virtual assistant.