The title "Napalm - An American Biography" is very indicating of the books content, because to me it seems not to be a comprehensive history of Napalm or Napalm-like incendiaries.
The book retells Napalms biography from its invention in Harvard in the 1940ies to the US ratification of Protocol III of the CCW in 2009. Along the way the author writes in detail about is weaponization, its use against Japan and North Korea, its use in Vietnam and Anti-Napalm/Anti-War protest movement it kindled, some cultural notes like movies and consumer products, the long story of its international regulation, the destruction of the US Napalm stockpiles and Napalms cousins brief stint in Iraq.
However, as I already said, it strikes me more of a retelling than actual history. The author frequently quotes from contemporary publications to paint a picture, but any critical analysis seems totally absent. At best a quotation is contrasted against another one, with little explanation given on what to think of the contradiction. I will give two examples. The first is, despite the author working out in detail how US conduct in Vietnam drastically changed perception of Napalm around the world we are offered no number, no discussion of number or estimates on killed and maimed by Napalm. Numbers of 400 000 to 800 000 taken from an Anti-War pamphlet stand beside quotes from a person touring south Vietnamese hospitals declaring it a rarity. I know that this is a very difficult question to approach, but I feel not even mentioning that true numbers are hard to come by is not enough. (Now that I think of it, I don't remember a single instance where the author cited articles or books of other historians.) The second example is, allegations of use in Chad by Lybia, or in East-Timor are printed, to not be confirmed, denied or discussed at all.
A topic I missed is the use of Napalm-like incendiaries by the USSR, which is finished by a single mention of a use in Afghanistan. But it could be simply outside of the topic the book wants to cover.
All in all i can recommend the book to people who want to read a comprehensive retelling of Napalms biography and its relationship with the US public and state, with frequent quotes to primary sources. I can not recommend it as a comprehensive, critical history of Napalm and Napalm-like incendiaries.
P.S. The book was published in 2015. In the last chapter, US senators are quoted arguing how important it is for the US to ratify treaties it negotiated if they want to maintain their diplomatic standing in the world. In 2026, reading these feels very different. Its sad that the optimism of a stronger rules based international order was replaced by genuine fear of its complete dismantlement.