Richard Rohmer’s Ultimatum is the story of the U.S. invading Canada as written by a Canadian. More precisely, it is the buildup to the invasion, the haggling, set in the backdrop of the 1970s energy crisis as the embargo-facing US confronts resource-rich Canada. Because of this, the novel takes the form of one conference room scene and exposition drop after another. It’s a book meant to show events, not characters.
It’s also a book that, although fairy short, features ridiculous amounts of padding. Part of this can be justified in that its format is that of “events/setting-first”, but even by those standards, it has a lot of stuff beyond it. There are incredibly long Herman Melville -style infodumps on everything from the nature of the Canadian government to pipelines to transport aircraft. A subplot involving two bomb-planters is about the only time the book leaves the meeting room, and even then it somehow feels like it could be cut without really missing anything.
Although I will say that a plot involving native saboteurs destroying oil infrastructure, helping lead to a large, somewhat contrived war is basically Red Storm Rising more than a decade before the real Red Storm Rising was published. I don’t know if Tom Clancy saw the plot and I think it’s likely just a coincidence, but it’s still an interesting combination. And in some weird ways it’s actually more plausible than Red Storm Rising, given that seizing Canada directly is more straightforward than “invade Europe so we can seize the Middle East later.”
However, the actual war will have to wait for the sequel, Exxoneration. Here, the book simply ends with the declaration to annex Canada. Thus, it’s all setup.
In terms of quality, this is a very dated book, and I’m not just talking about the politics. It’s entirely meant to capture a zeitgeist, giving curious readers a look at the wheeling and dealing towards an event. This was a time period where the US openly studied seizing OPEC-held fields by force, after all. But this type of work, especially one as “matter of fact” as this, has a very short shelf life, and the result is a historical curiosity.