1.5 stars 
 As a premise, I must admit that time traveling and I don't get on very well (as already stated in my review of "The time traveler's wife"). Either the author has been able to build a somehow reliable, logic idea of it (as in Gabaldon's "Outlander" for instance) or I tend to have a hard time imagining the characters disappearing here and popping out of nowhere in another place, at another time. Some of you might object that it's my fault and that I should avoid this kind of books a priori. You're right. Next time I'll try to remember that. Promise. But this book had received so many positive reviews by people whose tastes are usually similar to mine I was sure it would be good. 
 My feelings towards the storyline were mixed though. Having just finished the awesome, terrific, breathtaking "Daughter of Smoke and Bone" I was therefore perfectly aware of the fact that only few paranormal fantasy books would possibly compete with such a masterpiece. Alas! Now I know that "Wander Dust" isn't one of them. 
 To motivate my 1.5 stars, I wrote a list of the main issues that made me twitch my nose and narrow my eyebrows so many times I'll have to undergo facial plastic surgery ASAP. 
 From now on: Spoilers! 
 (view spoiler)[ 
 1) I hate vocabulary repetitions: 
 The verbs "cringe" & "shrug", for instance, recur obsessively throughout the narration, thus making the writing style redundant. 
 Well, as far as I know, being spoken all over the world, English is a language extremely rich in synonyms. My dear Michelle Warren, I suggest you buy yourself a good thesaurus dictionary where to look up for alternative words. 
 2) I can't stand when an author (that doesn't know how to fill up the pages) treats his/her readers like they were stupid. Referring 13 times to Bishop's "green eyes" didn't seem necessary to me. Thanks God I don't suffer from memory related diseases. Describing his eyes once or twice would have been enough, unless this is to be considered a device aimed at covering the fact that Bishop is just a flat, void, empty character with no other qualities but his beauty?! (And I'm sorry but, once again, Laini Taylor's handsome Akiva comes to my mind. No way the two can compete!!!) 
 4) the character of Sera's father is simply unbearable and his sudden appearance at the Academy the very first day Sera enters the new school makes no sense at all. 
 The same happens with Sera's new friends: one day they are attending the normal school and the next they just show up at the Academy without explaining when, how or why. Doesn't it seem a shortcut the author used to fill up the pages? 
 5) Still talking about characters: what a long gallery of stereotypes Ms Warren created! The ugly and bed Grungy Gang, the stinky clochard or the double-dealer wicked Perpetua. None of them will be unforgettable, trust me. Not to mention Gabe! He reminded me of Miss J. Alexander of ANTM with all his fashion advices. Just hilarious! And Ce.ce? What kind of scary name is that?!? My kids might have come up with something more original! 
 6)When Sera and Bishop were in Venice and she suddendly run away, a question arose in my mind: is she mad or what?!? I really didn't get the point of Sera's not kissing him. If the author's idea was that of increasing emotional strain, it didn't work on me. I ended up laughing at the whole scene so much as I laughed at many other characters and situations whose purposes I didn't understand. (Please note that I hadn't reach 65% of the book yet. I'll let you guess how eager I was to finish it at this point.) (hide spoiler)] 
 To end this long and boring sort of review let me say that this story disappointed me on so many levels I should stay up all night to write them down. I only hope the next book I pick up will be better but I'm sure it won't possibly be worse than this.