Much has been made of the climactic lightsaber “battle” in Rian Johnson’s divisive Star Wars: The Last Jedi. Even in a film that divided opinion on its treatment of long-held Star Wars traditions — wearing scary masks and keeping the bad guy alive until the final movie in the trilogy — the battle between Yrlo Ren and Luke Skywalker on the salt planet of Crait was perhaps the most-discussed.

The crux of the Skywalker-Ren showdown is one of confusion. What the hell? Jedi can just appear wherever they want like holograms? Some thought it a cool way to underline the impact of Luke’s legacy, some thought it a weird plot hole (spoiler: it was the first one).

Whatever you think, there was certainly little within the established Star Wars canon that suggested what Luke did — even as the most powerful Jedi of all-time — should even be possible. That is, until director Rian Johnson shared a series of tweets that, once and for all, refuted the notion, pointing to a Lucasfilm-approved book called The Jedi Path, published in 2010. The book set a precedent for something called the “doppelgänger” under “Advanced Force Techniques.”

The cover of 'The Jedi Path'
The cover of 'The Jedi Path'

Anyway, don’t take my (or Rian Johnson’s) word for it: you can own The Jedi Path right now. It’s available on Amazon Prime, along with another book, Book of Sith.

You can buy The Jedi Path and Book of the Sith for $33.48.

The cover for 'Book of Sith'
The cover for 'Book of Sith'

It’s a small price to pay to get a head-start on all the crazy new Jedi powers that debut in J.J. Abrams’s Episode IX, due out in December 2019.