The author is Bill Kauffman and the subtitle is The Long, Noble History of Antiwar Conservatism and Middle-American Anti-Imperialism. Here is one excerpt:
Above all, they feared empire, whose properties were enumerated well by the doubly pen-named Garet Garrett: novelist, exponent of free enterprise and individualism, and a once-reliable if unspectacular stable horse for the Saturday Evening Post. Writing in 1953, he set down a quintet of imperial requisites.
1. The executive power of the government shall be dominant.
2. Domestic policy becomes subordinate to foreign policy.
3. Ascendancy of the military mind to such a point at last that the civilian mind is intimidated.
4. A system of satellite nations.
5. A complex of vaunting and fear.
He could have listed this too. In my view this book goes wrong by failing to consider that the right-wing, anti-militarist tradition was wrong on some pretty critical cases. Nonetheless if you are looking for a well-informed, well-written, and up-to-date book on that tradition, consider this your go-to source.