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Zahn's latest novel, Thrawn: Alliances, explores the relationship between Thrawn and the Dark Lord of the Sith, Darth Vader. The book is divided into two eras; one sees Thrawn's first encounter with a Jedi Master, Anakin Skywalker, in the dying days of the Clone Wars. The other is set shortly before A New Hope, with Palpatine sending Thrawn and Vader on a mission together. Naturally, the two stories are interwoven, and they reveal a whole new Force-power - one that redefines the Skywalker legacy.
SKYWALKING
In order to understand this new Force-power, you first have to understand a more familiar power; the Jedi's ability to swat blaster bolts aside with ease. Zahn's novel establishes that Jedi can do this because they have a degree of precognition, experiencing what he refers to as a "double vision." There's a split-second in which a Jedi sees both present reality and future threat; this glimpse of the future allows a Jedi to move their lightsaber in position to block a blaster bolt, or to move with preternaturally fast reflexes when facing a physical attack. It's a smart explanation of a basic Force-power, but Zahn then takes this one step further; he introduces the Force-power known as Skywalking.
The bulk of Thrawn: Alliances is set in the Unknown Regions, a place where hyperspace is warped and distorted by supernova chains and perhaps even a collision with a galaxy of dark matter. The spacetime warps created by fluctuating gravity masses make it incredibly dangerous to travel through hyperspace into the Unknown Regions; there are no stable hyperspace routes, and a single mistake can mean your craft crashes into anything from a stray planet to a neutron star. The only safe way to travel through the borders of the Unknown Regions is with a Force-sensitive. Just as a Jedi predicts an incoming blaster bolt, so a Force-sensitive can predict the imminent threat of a gravity mass. Just as a Jedi swats a blaster bolt aside, so a Force-sensitive pilot can maneuver their vessel away from the danger. The Chiss refer to a Force-user who can do this as a "Skywalker," [...] The irony, of course, is that this deeper meaning to the Skywalker name has been baked into the Star Wars franchise from the start. In A New Hope, Luke turns off his targeting computer during the Death Star run. In that split-second, though Luke doesn't know it, he's blending the use of the Force with piloting - and becoming a true Skywalker. The Empire Strikes Back saw Luke find his own way to Dagobah, piloting the X-wing manually - without putting through any calculations for a hyperspace course. It seems likely the reason Anakin was considered "the best star pilot in the galaxy" is because of his instinctive blend of the Force and his own innate piloting skills.