“War Taxation: Some Comments and Letters” is a book by the renowned German born, American investment banker Otto Heinrich Kahn. Written during the First World War, Kahn examines American policy on taxation and opines that then new measures to raise taxes for funding the war effort, particularly on the wealthy are not well thought out. He warns that this would precipitate a situation of capital outflow to nations such as Canada with lower tax rates. Kahn also addresses the widespread speculation that “appears to prevail amongst not a few people the strange delusion that America's entrance into the war (First World War) was fomented by moneyed men, in part, at least, from the motive and for the purpose of gain.”