3.5* I'm beyond conflicted on whether to round up or down >:( 
 Such a cool premise and a strong start, but the more I read the more I was like meh. I think books should have the opposite reaction, and a book isn't as fun when I can predict outcomes correctly (view spoiler)[ I literally guessed who "the doctor" was a paragraph before it was revealed. When I realized it, it was an OMG OMG OMG OMG moment, so that was okay for me to predict. I didn't guess that Finn would "die," so that was a shocker that broke my heart. But the kicker/what irked me was when I guessed that James would kill himself. It was pretty obvious from the beginning that someone had to die and knowing this was a stand-alone made it easier to narrow down what was going to happen. I mean, it was the ending that made sense but still I was hoping that something else would happen. (hide spoiler)] 
 A lot of authors would stay away from time-traveling because it gets messy with the paradoxes and it's been done so many times before. But I think Terrill took a cool spin on it that was not too confusing. I especially liked the importance of the drain! 
 I think this a worth a read, but don't expect to feel mind blown after reading it (though there are mind-blowing moments, they are undercut by the ending).