Crossfire, by Fonda Lee, is the science fiction sequel to the popular book Exo. Donovan Reyes, the protagonist, is certainly no ordinary man. He is an exo, or a human possessing an exocell. Implanted using a special procedure, exocells allow for heightened strength and intelligence compared to “squishies”, or ordinary humans. Having an exocell has never been more important, for Donovan resides on a vulnerable Earth, where humans are ruled by a superior alien species, known as the Zhree. They protect desperate humans from intergalactic threats like Sapience and are vital for humanity’s survival. Working as a member of the security forces and as an adviser to the Zhree “Zun” (leader), Donovan’s life is full of chaos and turns. But, everything changes when the Zhree choose to leave Earth, leaving humanity defenseless. Donovan and his friends know the situation is dire and must do whatever it takes to save the only home they have ever known. What will become of Earth, Donovan, and the galaxy? Read Crossfire to find out.
I found out the hard way that this book is near impossible to understand without having read Exo first. I dove into Crossfire with zero background knowledge and struggled immensely. There is a whole plethora of vocabulary, like Prime Liaison, Hardening, Exocell, Zhree, and Erze that is necessary to process the events of the story. I finally gave up and skimmed Exo before coming back to Crossfire, and all my problems were solved. So, in closing, I’ll put it simply: read Exo first.
Crossfire was action-packed once I was able to comprehend it. The entire last half of the book was one humongous climax, and was very entertaining. There was essentially no exposition, because it is assumed that the reader has already seen the characters in Exo, and is aware of what is going on. This contributed to the seemingly lightning-quick pace of the story.
Additionally, I enjoyed puzzling through the numerous ethical questions in the story. For example, towards the beginning the "Zhree Zun" wanted all humans to become exos, despite the procedure having a 3 percent mortality rate.
I rate this book 4 stars, since it was gripping and appealing to me as a lover of science fiction. However, I felt Crossfire could have done with a slight exposition to refresh the reader’s memory on the characters and terms. This is the only factor that lowered my rating from a 5 to a 4. Regarding age recommendation, I believe that children 10 and up would enjoy this book most. Because of the fast pace, even impatient readers can get through it without dealing with boring monologues. This makes Crossfire highly attractive to younger readers.
Review by Anya A, 13, Metropolitan Washington Mensa