My mother suggested I would enjoy Harry Turtledove, so when I was wandering an airport bookstore and came across In High Places, I bit.
I finished this slim novel on the brief flight to Phoenix. This was a reasonable tale, though nothing special. Certainly an imaginative premise, though. I learned just now that the Crosstime Traffic series is aimed at young adults, so I suppose the length is deliberate.
I’ll have to try the re-imagined American Civil War series instead.