(1989) The 4th volume in Clancy's series of thrillers featuring intelligence analyst Jack Ryan has Ryan responding to a covert military operation gone sour, targeting drug production in Colombia. I haven't been a fan of this series but it's growing on me: it's turning into a sort of technothrillers where the "techno" is US political machinery (plus enough peril to keep the ship moving). Flaws, yes, but interesting, and this is my favorite so far