...then there's an issue of which you should be aware!
Due to changes in the latest version of the Mac OS (Mac OS X 10.12.2) and the Kibo/Shopatron download process, any pdf copy of The DCS Companion 3rd Edition downloaded prior to today from Shopatron will not open properly in Apple's Preview application on any Mac that's running Mac OS X 10.12.2. However, it will open correctly on any Mac running an earlier Mac OS , or on the latest Mac OS with either Adobe Acrobat Professional or the free Adobe Acrobat Reader applications.
The correction is to simply download another copy of the The DCS Companion 3rd Edition pdf from Kibo/Shopatron.
No other computer, smartphone or table platform is affected.