Endangered Species
Age rating: Ages 13–15 · Teens
Age rating and Christian content guidance for parents.
First published 1991
Two young detectives, Frank and Joe Hardy, investigate a series of mysterious thefts in their town.
Concern Level
Mild
Virtue Level
Thin
Concern Level
Mild
Virtue Level
Thin
What is Dokilit?
Dokilit is an AI-powered content guide for Christian parents. We analyse books through the lens of faith and family, then show you the concerns, the virtues, and the conversation points that matter for your home.
Things to consider
Higher = more presentNo sexual content is present in this book.
Mild peril and chase scenes occur, but no graphic violence.
Profanity is absent from the characters' dialogue.
No blasphemous language or themes are included.
Substance abuse is not a topic in this book.
No suicide or self-harm is depicted.
Some suspenseful moments exist, but it's not truly frightening.
No occult or supernatural elements are present.
No LGBTQ+ themes or characters are featured.
The worldview emphasizes problem-solving and justice.
No negative portrayals of Christians are present.
Virtues to celebrate
Higher = stronger presenceFrank and Joe display courage and determination in their investigation.
Faith is not a theme in this mystery novel.
Brotherly loyalty and teamwork are evident.
The story focuses on solving crimes, not on grace.
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