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Cover of Keeper of the Lost Cities

Age rating and parents' guide:Keeper of the Lost Cities

by Shannon Messenger

Ages 9–14

Keeper of the Lost Cities by Shannon Messenger is best for children aged 9–14. It has mild violence, a few mildly scary moments, a little romance and no bad language.

Twelve-year-old Sophie has never fit in with humans, largely because she can read minds. Everything changes when she meets a mysterious boy and discovers she is an elf from a magical, hidden civilization. Leaving her human family behind, Sophie must navigate an elite academy, unlock repressed memories about her origins, and face dangerous secrets threatening her new world. Young readers are drawn to its immersive world-building, high-stakes mysteries, and the relatable challenges of making friends while feeling different.

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Content ratings

How much of each a parent can expect, from none to strong.

Violence
Mild
Scary moments
Mild
Romance
Mild
Bad language
None
Dhiraj Bodade

Content checked by Dhiraj Bodade, co-founder of Bookstaken, on 21 September 2026.

At a glance

  • ★Novel
  • ★Part of the KotLC series
  • ★A steady start that picks up quickly
  • ★Mostly text
  • ★Emotionally light

Great for kids who like

  • Action & Adventure

Reading mood

  • Adventurous
  • Suspenseful

Good to talk about

  • Family
  • Action & Adventure

Books like Keeper of the Lost Cities

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  • Cover of The Explorer

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    The Explorer

    by Katherine Rundell

    When a small plane crashes into the Amazon rainforest, four children survive alone with no adults to guide them. Fred, Con, Lila, and young Max must quickly figure out how to forage, build shelter, and navigate the jungle's dangers together. Their desperate fight for survival takes a surprising turn when they uncover clues left by a mysterious figure who lives hidden deep within the trees. It is a gripping, atmospheric adventure that celebrates resilience, teamwork, and the natural world.

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  • Cover of Nevermoor

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    Morrigan Crow is cursed and blamed for every local misfortune, doomed to die on Eventide. Instead, a mysterious man named Jupiter North whisks her away to the secret, magical city of Nevermoor. There, Morrigan must compete in four dangerous trials against hundreds of talented children to win a place in the elite Wundrous Society. Full of whimsical charm, eccentric characters, and high-stakes excitement, it is an inventive adventure about courage, friendship, and finding where you truly belong.

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  • Cover of Warriors

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    Warriors

    by Erin Hunter

    This fantasy adventure introduces readers to Rusty, a curious house cat who leaves his comfortable domestic life to join ThunderClan, one of four rival groups of wild cats living in the forest. As he trains under the new name Firepaw, he must prove his loyalty, learn ancient survival codes, and face dangers both from rival clans and traitors within. Young readers love the immersive animal society, the tense clan politics, and the fast-paced battles.

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Questions parents ask

Q: What age is Keeper of the Lost Cities for?
Keeper of the Lost Cities suits children aged 9–14. It is a novel: a steady start that picks up quickly, mostly text.
Q: Is Keeper of the Lost Cities appropriate for a 9 year old?
Yes. Bookstaken rates it for ages 9–14. It has mild violence, a few mildly scary moments, a little romance and no bad language.
Q: Is Keeper of the Lost Cities part of a series?
Yes, it belongs to the KotLC series. If your child enjoys it, the other KotLC books are the easiest next step.
Q: What should my child read after Keeper of the Lost Cities?
Try Pax, The Explorer and Nevermoor. They share the same kind of story and suit the same ages.
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