The Light of Paris does what all great (yes, I said “great”) books do. It puts you in the shoes of the protagonists, so that you occasionally blink and realize that you aren’t in the story.
Conceptually, the story is interesting. I’m purposely not saying anything more, because it wasn’t a terrible book, and you might want to judge for yourself. I personally always like quests. And this was a pretty cool catalyst and outcome (if only Perdu would’ve gotten over himself at some point).