This one was just....eh... 
 I wanted to like this book because I like Gayle Forman. I like her despite a lot of things. I like her despite her obsession with teenage romances as the most important things to ever happen to you, her aimlessness in some of her simpler stories, her asshole male characters... but I couldn't get past this. Not this time. Because I've already read this book but better and less miserable. 
 Let me stress this to you all: you have already read this book before. But better. And less miserable. (Read Sweet Filthy Boy if you basically want the hot Paris summer fling book; cute, romantic and loads of sex because that's where my priorities are. It's the same plot but drawn out over a few weeks so this protagonists seem less crazy. It's got the same dual identity, parental disputes, and existential crisis as this book but with fucking). But this book exists, in many forms. One of which by the same author. 
 Here's the thing, this is how "Just One Day" changes our protagonists' life, how she is so deeply in love with this guy after one day that she has to chase him down to get answers, for better or worse, over the circumstances in which they parted (Literally the plot of Where She Went) and this "One Day" was just...eh. Like it was cute, but this is supposed to sustain the romance for the entire book and it just did not accomplish that. This is supposed to be the inciting incident! This day is her motivation and want the entire rest of the book! And it's kind of cute and romantic but then it is treated so dramatically. She is profoundly heartbroken by and experience that most 18 year old girls would shrug off and go off to college and look back with this ironic sort of fondness. And every clue she gets on her way to finding this guy just makes him seem like an ASSHOLE. I know there's another side to his story (we are given none of it until book 2, oh fucking kiss my ass Gayle Forman) but all we know is that he has been whoring himself around Europe and Allyson looks like a fucking idiot every time she continues her search after meeting one of his groupies. She fucking works her ass off to go on this trip to find him after a year of being depressed over this guy! 
 This is an okay read. I wasn't horribly offended, there were just parts that should have been stronger to support the premise of this story. I enjoyed the voice at times. It had a solid, likable charm. But the set-up was just too flimsy, and I'm comparing it to an erotic novel written by two former fanfiction collaborators. I still might find myself reading the sequel. Might.