Luis Fuentes has always been sheltered from the gang violence that nearly destroyed his brothers’ lives. But that didn’t stop him from taking risks—whether he’s scaling a mountain in the Rockies or dreaming of a future as an astronaut, Luis can’t stop looking for the next thrill.

Nikki Cruz lives her life by three rules—boys lie to get their way, don’t trust a boy who says “I love you,” and never date a boy from the south side of Fairfield. Her parents may be from Mexico, but as a doctor’s daughter, she has more in common with her north-side neighbors than the Latino Blood at her school. Then she meets Luis at Alex’s wedding, and suddenly, she’s tempted to break all her rules.

Getting Nikki to take a chance on a southsider is Luis’s biggest challenge, until he finds himself targeted by Chuy Soto, the new head of the Latino Blood. When Chuy reveals a disturbing secret about Luis’s family, the youngest Fuentes finds himself questioning everything he’s ever believed to be true. Will his feelings for Nikki be enough to stop Luis from entering a dark and violent world and permanently living on the edge?

The Perfect Chemistry trilogy is one of my top five favorite series. I actually was putting off reading Chain Reaction because I wasn’t ready for the series to be over.

I absolutely love Alex and Carlos, but Luis is by far my favorite Fuentes brother. He was a good guy who didn’t want to get caught up in the same trouble his brothers got into. He ended up getting sucked in because he wanted to keep the ones he loved safe but didn’t know how else to do it. He was young and still trying to figure out who he was.

It melted my heart the way he treated Nikki. He put on this whole ‘player’ act but you knew that’s all it was. He really did respect her. I understand why he lied to her, but I really think he should’ve been honest with her or not been friends with the wrong people. He did what he did to protect her and not scare her or make her her feel like she was a problem.

I couldn’t get enough of Chain Reaction and just couldn’t put it down. I forced myself to put it down a few times, but I couldn’t keep myself from reading it for very long. I just didn’t want to say goodbye to the brother and wanted it to last as long as I could get it to.

I never reread books, but I plan to read the entire series again. I will never get sick of them.