I am so far behind on my reading these last 6 months or so. I have a ton of books in hardcopy and tons more ebooks on my Kindle. Thats ok by me though because once my husband gets retired (4 or 5 yrs) and we hopefully move south I'll have plenty of reading to keep me entertained. 
But no I haven't read Hell is Empty yet. One of the things I like when I read is the sense of place. Wyoming as a setting was a plus for me in Johnson's other books. Though I must admit I enjoyed his writing style and his wit a lot. So your saying it lacked much humor kinda worries me.
As the Crow Flies will have to wait for me to buy because I only read paperback hardcopy books because they are lighter to hold. That usually means that I'm a year behind the original hard cover release.
I only get ebooks for my Kindle that are either a new to me series or a stand alone. I'm a little ocd I think. 
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