I looked through Ivan Doig's entire bibliography once I read The Sea Runners, but I have to honestly say that there was nothing else that interested me. His first book appears to have been a one-off, and from there he went into writing regional novels and stayed there. I'm just not interested in reading novels about that region at this time, so I certainly can't fault you for giving up on Bucking the Sun.
I'm glad Mrs. E enjoyed Stange Shores - I totally love the Erlendur character, too. I also loved the Rebus character, so I hope she enjoys Tooth and Nail as well. Although I must say that I'm glad I'm read the bulk of Rankin's books before I went on strike on any books that had serial killers as a plot device. In Rankin's hands I could tolerate it - at least at the time I was reading him - but I've now sworn off reading any other novels that feature serial killers.
The C.J. Box Joe Pickett series looks interesting, I'll keep them in mind. The truth is, however, that I much prefer foreign authors over American, and much prefer novels set just about anywhere else but in the U.S. My "escapist" reading means just that - for the most part, I choose to escape my effed up country altogether.
Oh, and the Michael Crummey book was absolutely extraordinary! You can read my little review that I posted separately.