Huff, Tanya -- The Heart of Valor

This would be other way around -- old and crafty sergeant assigned to young and naive cadre of officers. A training platoon, actually, for a completely routine basic-training course, and the supervising officer is recuperating from an injury -- I can't even remember the excuse for this blatant bit of plot-setting-up, but naturally everything goes straight to puddleglum and only the craftiest of sergeantry can save the day. These will never be not fun. But am I buying them in hardcover? Sir no sir.

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