Watching a television series or movie is different than reading it's adaptation in book form. And this is how it should be. In this form of media one gets into the minds and emotions of the characters. I was somewhat confused as to why the story ended at a point where it had. One could have easily felt "left-hanging" as Beck proceeded into a rescue mission. Then, before we see if he's even successful or even goes back to Tron to tell him he wishes to proceed with his training, "the end".
However giving this more thought the storyline is focused more-so on Beck on his introduction as well as his feeling "into the role" of the shoes of the legendary Tron, the mentor who's name and persona he's expected to follow as he learns the whys and reasons he must lead an upcoming revolution. Tron, his mentor, supportive role. Meanwhile, Beck's friend Cutler unknowingly echoes Tron's encouragement as Beck struggles with what's expected of him. Looking at it from this perspective the novel does pretty well as a "one-shot". Looking at it any other way may cause one to conclude it's unfinished.
Yet, had there been a series of novels was written to be an adaptations of the series, I would have expected them to be more exploring of the episodes in question in full.
The reason why I didn't give this a 5-star review is...there are some misprints in the book. For example, Cutler and Beck are speaking together when they're inhabiting a cell at the Colosseum. Beck will make a statement and, instead of Cutler being the one to make a response "Zed", one of Beck's friends (who isn't even there) does so instead. Apparently it's a typo. And there are a minuscule number.
Strangely, when I first ordered the book, I first thought it was the adaptation of "Beck's Beginning", not "The Renegade". So, if your looking for the Prelude to the series, Disney decided to simply go for the 2 parter episodes instead.