The Unconquerable: Bolos 2
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This book is in the same manner - short stories (although by different authors this time, rather than one), going "historically" from earlier marks/earlier periods up until after the great war with some races almost eradicated.
The stand out story, in my view, is "You're It", which really keeps the momentum going until the end, the rest are mostly still quite good.
This is book 2 in a series, the others are proper full length novels, and generally better for it.