Trevor is a 16 y/o Navy brat on a base in Rota, Spain. He's grown up moving every few years when his dad, Pastor Larson, a Protestant chaplain, gets reassigned. Sometimes he meets up with friends he'd made in DOD schools at other bases, and that's the case in Rota. He's lived there a few years now, and a few of his better pals from the Okinawa base are now in Rota, but not his very best friend Brad. Brad shipped out form Okinawa and dropped off the face of the earth, it seemed, because he wouldn't respond to any of Trevor's emails, IMs or texts. It's been four years, and Trevor's stunned to get an email from Brad saying he's coming to Rota in a month, and he's changed. A lot. Trevor wonders if that's because Brad's gay and bad things happened when he moved form Okinawa. Trevor's determined to be good friend to Brad, no matter what. 
 Shannon is a transgender girl, who used to be Brad. It's been a hard four years but she's transitioned well, and feels good in her body for the first time, perhaps, ever. She's had a lot of backlash in her personal life, though her parents completely support her, even if they all suspect her transition may have caused her dad not to make his promotion that past two years. Still, she's being homeschooled, and trying to keep a low profile; unlikely in the small circle of families that make up overseas bases. 
 Trevor is stunned when he meets Shannon, and pretty angry she didn't trust him enough to divulge her big secret before they met in person-or at any time in the past four years. His reaction isn't excellent, but Shannon interprets his swift departure as a rejection of her new self, and that's a stumbling block. Trevor does make it up to Shannon, and Shannon fits into their group of Okinawa friends without too much issue. There are some quakes in the personnel, however, and Shannon's the center of some anti-trans sentiment that's sweeping the base, including members of Pastor Larson's congregation. It's upsetting for all, but Trevor's more confused about his changing feelings for Shannon. They shared a deep friendship as kids, and now when he thinks back, he doesn't see "Brad" in those memories, he sees Shannon, and he's not sure what to do with his growing attraction to her. What if they break up and become enemies, as some of his buddies have with their exes? 
 This book is told from Trevor's and Shannon's point-of-views and that's really interesting. I liked how culturally-competent the characters' inner thoughts, actions and dialogue are. These are kids who are have fought hard to maintain friendships, and they aren't willing to toss Shannon aside because of her transition. In fact, all of Trev's pals accept her wholeheartedly into their group, and their girlfriends invite Shannon on shopping trips and makeovers. The kids also stand up for Shannon when she's accosted in public or put-down in conversations they overhear. Trevor's mistakes with Shannon come from his own insecurity, and aren't related to her transition. 
 The intimacy that develops between Trevor and Shannon is cautious and tender. Trevor just got his best friend back...he doesn't want to mess things up by being a bad boyfriend. He's never even dated a girl before; realistically he's sure he'll mess up and they'll stop speaking again. Shannon's never dated and she is insecure about her body, and how a partner would view her body. It leads to some discord between them, that has a good resolution in the end. 
 This is a YA read, so expect YA-levels of steam, and nothing more. That said, there are some unique experiences here due to Shannon's physiology and that provokes some valid and frank discussion. I liked how sensitively that was handled, and the introspection both Trevor and Shannon demonstrate is valuable for people who have concerns about trans-persons and their relationships. Shannon didn't expect to find a partner who could love her as she is, and has a reasonable fear of fetishization, though she doesn't think Trevor sees her as a fetish. She's also nervous that he'll be unhappy with her physical state, and that's an anxiety-triggering situation. Trevor's more afraid of being a bad partner, given his lack of experience. It was really endearing and felt realistic. The military aspect of this story likewise felt well-informed, and I could absolutely see all the sights in Rota and nearby, just as Shannon did. Yet another locale to put on my travel bucket-list. Readers who enjoy teen romance, or trangender stories, will really enjoy this one. I know I did.