I received this book in exchange for an honest review on NetGalley. Thank you to the author, Alexandra Bracken, and the publisher, Disney-Hyperion, for this opportunity. I have had this book on my lists since it's release date. So I am so, so thankful for this copy! 
 I am excited to say that this book exceeded all of my expectations! I won't dive into particulars concerning the synopsis as there are far more twists and turns to this plot than I can hope to recount here, but I will say that this book explores the trope of time travel and that should be enough to make almost anyone want to pick this up! 
 Passenger is set from two first-person perspectives, Etta and Nicholas. I found each had their own distinct voice and I grew to love them both equally. The instantaneous adoration for each other was a little too sickly for my tastes but, thankfully, wasn't dwelled on for too long in the novel. This novel manages to have enough plot without using extended kissing scenes for filler. 
 I was honestly so blown away by the beauty of the writing and the world building Bracken managed to incorporate. The setting was constantly shifting and yet I never felt confused or like I could not conjure each setting in my mind. 
 I also appreciate that this wasn't just a straight-forward fantasy, or historical fiction, or romance and could not be labelled as any one genre. It brings the best of all of these and amalgamates them into something fresh and exciting. There was the main trope of time travel and yet this also managed to incorporate so much more into this! There was a satirical edge to this novel that went far deeper than just straight up dystopia. The author dealt with themes such as sexism, racism, religion and culture with a grace and knowledge. She bellied any anger I could conjure concerning any individual character's prejudice on a topic by having that character suffer some deserved fate or allowing another to intervene and give them an, equally as well-deserved, piece of his/her mind. This book, and all it's many themes, were kick-ass in every way! 
 I believe this book has suffered from the 'Marmite effect' - you either love it or you hate it! I, of course, adored it! I see as many one and two star reviews as I see four and five so don't let my, or anyone else's opinion, sway you on this one!