Extremely crude and deeply sexist throughout.
Too misanthropic to be even called racist.
Proud and devout lover of death, rape, genocide, killing, etc.

And with that out of the way.

Most military books are either written for A) Historians or B) Military or Ex-Military people, this makes a vast majority of them either hopelessly outdated for the last 60 odd years of irregular conflicts that have consistently stymied the most expensive and elaborate armies that humanity could bring to bear OR just plain gobbledey-gook that you need 15 years of military experience and far too much faith in Uncle Sam to understand.

Or both.

The War Nerd is an extremely readable world tour of various wars, conflicts, terrorisms and other deadly occurrences. Brecher is consistencly acerbic and crude about just about any horrible and graphic event you can imagine; BUT assuming you can move past that Brecher offers an extremely cohesive and convincing guide to what warfare in the 21st century is.

Brecher tackles the questions of irregular warfare that America has spent trillions of dollars and countless lives trying to answer and comes up with simple and compelling analysis of what went wrong and what went right in various conflicts across the globe.

If you don't really know how America lost in Iraq or what is happening when the news mentions a conflict in Africa this book will give you a more readable and broader view than many others out there.

Just read with a handful of salt.