Incredible book. It's a bit of a dry read and a bit more "academic" than some will probably like, with the author going to great lengths trying to appear as unbiased and unemotional as possible. Ultimately, though, this just gives even more weight to the information in the book as it's essentially just a documentation of sourced facts with dates and names attached. It allows the reader to basically take the information and do with it what they will.
The book offers a peek behind the curtain of international war and those who profit off of it. It shows how, even 100 years ago, there were extremely rich and powerful men provoking war in every way possible, and then selling weapons and ammunition to both sides of the conflict they helped create. A German company, for example, would sell weapons to Germany while also secretly (and sometimes not so secretly) selling weapons to the enemies of Germany at the same time. And while that's happening, they'd post propaganda in the press and newspapers that they also owned to provoke other countries into the war so they could sell weapons to them too.
At the end of the day, war = profit and as long as that's true, the eponymous "merchants of death" will do everything in their (immense) power to prevent world peace. Morality, love of one's country, none of that matters to them as long as the war machine keeps chugging along and filling their bank accounts.
Sad to say that here in 2022 nothing has changed. Some of the exact same companies and families mentioned by name in this book are still doing the same things today, only on an even bigger scale.
This should be required reading for all kids growing up.