Just an FYI for anyone contemplating buying my book Hacking and Penetration Testing with Low Power Devices which is about building cheap, but powerful hacking hardware from the BBB:
Syngress is running a sale on all their books where you can get a DRM-free eBook for free when you buy a print book with deal code BOGO or up to 40% off anything with deal code DELTA. The net of this is that you can get the eBook for $44.96 or both for $59.95 at http://store.elsevier.com/product.jsp?isbn=9780128008249.
This sale goes till October 9th and as far as I know includes all their books, not just mine.