The Amazon $.99 Version
The FREE Version
Amazon doesn't list books for free. If they did, acquiring Exit via-Global Megacorp wouldn't cost you one hot nickel.
Smashwords allows authors the ability to list titles for free.
The text is no different between the versions (although the aberrant behavior of ebooks means god-knows-what in the holy name of "flowability").
Whichever version you might so kindly select, a zombified squirrel awaits your company.