For anecdotal accounts I would offer my memoirs concerning life in around 6 dipomatic missions and inside two country teams, one disastrously dysfunctional and the other very well led. Journey into Darkness: Genocide in Rwanda reviewed on SWJ here
I would also point to Ambassador Robert Gribbin's work on Rwanda In the Aftermath of Genocide: The US Role in Rwanda
Another SWJ member's work is Contra Cross, which also offers insights on country teams. I reviewed it here
Best
Tom
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