I was ready to order the first book until I realized the second version is not available on the Kindle format, which really sucks. Digging deeper, I've found this on the change notes:

"Please note that the Kindle version will not be updated at this time. I get very little interest in the Kindle version and at this time will no longer pursue that format. If I get enough interest from you readers about the Kindle version, I may decide to update that format then."

That's a real bummer, I don't feel like paying the international shipping fees and hassles... this really demotivated me from the buy.