While Sentry is (by design) a short, single plot, introductory novella telling us some of Jeri’s backstory. Vargas Ascending has several converging plot lines leading to an epic climax dealing with the evil of a megalomaniacal genius pushed too far.
It is intended to be the first of a series and a moderate (hopefully long!) story arc involving Jeri, a Pankeen Clansguard named Hal, a Latharian assassin, and an old, wizened Pankeen sage. Each has their own agenda, but they are united in their common enemy: the power mad Doctor Vargas. Vargas threatens to unleash forces across the countryside that could potentially wipe out all mortal life.