Of course I can't wait to get a hold of Peaceable Kingdoms to see how this mini-series wraps up. The first two books were not as good as the last two books. Books 3 & 4 just seemed to kick the series into high gear.
If you don't mind eBooks, both Google Play and Amazon have Peaceable Kingdoms
for $4.78. Google Play has it in ePub and Amazon has it in KF8.