The 5th Wave, Book 1

The 5th Wave contains a large amount of violent action. The backstory involves the extermination of billions across the globe: through the effects of artificially induced natural disasters, a horrifically bloody virus, and the infiltration of alien intelligences into the human population. The main characters are in constant danger, and they suffer various injuries. They also kill their perceived enemies at a distance and at close range. A complete catalogue of violent acts in this book is impossible, but it pulls no punches in describing the effects of genocide. Sensitive readers should be wary.

Under constant physical threat, the characters in The 5th Wave have very little time to think about romance or sex. Cassie has a crush on high school football hero Ben Parish, but she's most strongly attracted to mysterious Evan Walker. When she's unconscious, he bathes and changes her from her bloody dirty clothes into a nightgown, something she realizes when she regains consciousness. While she recuperates at his cabin, she can't help staring at his hair, smile, and rear end. There's a lot of kissing and thinking about sex in the parts of the story involving Cassie and Evan: She contemplates whether he had sex with his ex-girlfriend, makes out with him on a bed, and wonders what it would be like to have his hands all over her body. They share an experience of total intimacy, though not intercourse.

With its characters under such constant stress, the language in The 5th Wave can be fairly harsh at times. There are multiple uses of "hell," "damn," "son of a bitch," "bastard," "piss," and "s--t." Variations of "f--k" are employed a couple of times, in especially intense scenes.