I too have read all of the books in the Cork O'Connor series.  I always look forward to the release of the next one and while Kreuger has hinted that this series may soon be coming to an end, I selfishly hope that is not the case.

I'm not convinced that Heaven's Keep was his strongest in the series, but that may just be personal preference.  This book seemed to me to be a huge departure from the previous books, and while it didn't totally work for me, I was captivated and had a hard time putting it down.    

I certainly reccomend this series for a fun read.   Like JChief, I started with "Boundary Waters," then went back to "Iron Lake."  The character develop has been fun to read and I have appreciated the redmeptive nature of some of those relationships, especially the relationship between Cork and Joe.  Perhaps that is why "Heaven's Keep" left me a bit dissapointed.

I will be interesting to see where Kreuger goes from here.