I tend to accentuate the positive whenever I read anything. To start off, the prose was easy enough to slip into and journey with as the story moved along. I enjoyed Ms. Derting's style of storytelling. The pace was pleasant; my pulse was thrumming when suspense peaked and when the romantic lead went about his various attempts to sweep the heroine off her feet. 
 The supernatural/mystery/back-from-abduction element was intriguing. We only know what's revealed to Kyra, our strong-willed heroine. This is the first volume in a trilogy, so I don't doubt that things will be revealed later on, at the pace Ms. Derting has chosen. I like the characters she has woven, and trust that she will expertly flesh out this story and lead her endearing characters to wherever they're meant to be. 
 The romance build-up was savory and sweet. The chemistry leaped off the page. I didn't have an issue with the age gap or that Tyler was 12 when Kyra last saw him. They had both changed by the time they met again after she returned. The two leads also changed as the story and their relationship progressed, moving ever forward as they tried to make the best with what knowledge of the past they had as well as their deep concern for one another. They both care for and are attracted to one another, so what else matters? Tyler was too sweet, with his chalk dedications and book recommendations. They complement each other wonderfully. Tyler's puppy love for Kyra and his pulling out all the stops to make her his was adorable. More than that, he was her crutch; during the turmoil, his loyalty from her never strayed. She was more introspective with him, accepted herself better because he never passed judgment on her. 
 Kyra's preoccupation with time at the start of the story, I feel, highlighted the underlying theme of change. She was gone for five years - half a decade - and in that time, the relationships she left behind changed, as the people within them changed. Such is the impermanence of life, held intact by the only guaranteed constant: change. 
 Kimberly Derting took the alien abduction premise and added her own elements in the form of fireflies as well as Kyra's special abilities. There was also quite a bit of history fleshed out, courtesy of Jett. 
 This was my first time reading Ms. Derting's work. I commend her expertise with crafting a beautiful, heartfelt journey and carving memorable characters. :) 
 I enjoyed this marvelous read (it ended on a cliffhanger, btw), and immensely look forward to the second installment. I'm curious, though - can anyone affirm that film rights to this novel are being negotiated? It would be phenomenal to see this translated to the big screen!