Exo by Fonda Lee

A long time ago, there was a war between the aliens and humans. The aliens won and gave humans some technology to let humans have very strong shells. Humans with these are called exos. There are also humans still against the aliens called Sapience. Donovan Reyes, the son of the exo government was captured by the Sapience and his father won’t negotiate. Donovan’s life is on the line, if his father negotiates, sapience wins, if his father doesn’t Donovan dies.

This book was great because it had an exciting mix of action and science fiction. I would recommend this book to 13 years and up because of the rare but gruesome scenes.