Term Limits, published in 1997, was the first novel written by the late author, Vince Flynn, who would go on to write 13 more books before his death in 2013 centered around the character of Mitch Rapp. While this book is not a part of the Mitch Rapp series, it is tangential to it, as some of the characters that would appear in the Rapp novels (main and ancillary characters), such as Thomas Stansfield, Irene Kennedy, and Jack Warch) do appear in this book.
Term Limits has a similar pacing and tone as the Rapp novels, although this one is almost exclusively a political thriller. The story involves the killings of four corrupt members of Congress and a threat that more corrupt politicians will be killed unless the President and Congress enact reforms to prevent the US economy from collapsing. The book definitely leans on the theme of the crushing national debt, which at the time Flynn wrote the book was not nearly as bad as it is now, and definitely takes a conservative bent (as Flynn was a conservative). But, Flynn did not make Republicans the good guys and Democrats the bad guys. Indeed, almost every character in the book was at least morally ambiguous, and Flynn wrote it so that members of both parties were to blame for the financial condition of the country. It is a book where even the "good guys" do bad things and the disdain that Flynn seemed to have for politics in real life definitely came through.
Overall, the book is a decent thriller with a lot of action and intrigue. I do not think it is as good as the best books in the Mitch Rapp series, but the story flows well and there is a good balance of action and political intrigue. It is interesting that Flynn never went back to any of the plot points, but I think he may have wanted to repackage one of the characters in the book that would appear in several of the Rapp novels. The book is just over 400 pages but is a pretty easy read. It is a book that people who read relatively fast should be able to get through in a couple of days. I would call it an interesting read for people who have read the books in the Mitch Rapp series if nothing else to see how Flynn's writing style evolved over the course of time, but the book does not really tie into the other books (at least not the ones that Flynn wrote before he died) so it is not a must-read. I am not sure if Kyle Mills (who took over the Rapp series after Flynn passed away) ever referenced the events of this book since I have not read those yet, but nothing in the book impacts any of the novels up through The Last Man, which was the last full novel that Flynn finished.