Best Science Fiction Books for 11 Year Olds (2026): 5 Compared

Eleven is the perfect age for other worlds: the best science fiction books for 11 year olds mix adventure with big ideas. We compared five by fit, content, value and age guidance, using only what the listings publish.

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The picks

#	Product	Shelf Score	Buy
1	Percy Jackson Set	9.7/10	Buy
2	Choose Your Own	9.7/10	Buy
3	The Proto Project	9.7/10	Buy
4	Mostly Invisible Boy	9.7/10	Buy
5	Last Day on Mars	9.7/10	Buy

1

Percy Jackson Set

Rick Riordan·9.7/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

Rick Riordan's 1920-page Percy Jackson 5-book boxed set, ages 9+, 2023.

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Pros

• 1920 pages, the longest here
• Ages 9+ years stated
• Disney Hyperion stated

Cons

• 1920 pages, the longest here
• 2023, the newest
• 5-book set, one series

2

Choose Your Own

R. A. Montgomery·9.7/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

R. A. Montgomery's 576-page Choose Your Own Adventure 4-book set, ages 7-10, 2006.

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Pros

• 576 pages stated
• Ages 7 - 10 years stated
• 2006 stated

Cons

• 576 pages, long
• 2006, the oldest here
• 4-book set, one series

3

The Proto Project

Bryan R. Johnson·9.7/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

Bryan R. Johnson's 188-page The Proto Project, ages 8-10, 2019.

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Pros

• 188 pages stated
• Ages 8 - 10 years stated
• Lexile 600L stated

Cons

• 188 pages, short
• 2019, recent
• AI, one topic

4

Mostly Invisible Boy

AJ Vanderhorst·9.7/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

AJ Vanderhorst's 292-page The Mostly Invisible Boy, ages 8-11, 2021.

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Pros

• 292 pages stated
• Ages 8 - 11 years stated
• Book 1 of 7 stated

Cons

• 292 pages, mid length
• 2021, recent
• Book 1, start of series

5

Last Day on Mars

Kevin Emerson·9.7/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

Kevin Emerson's 352-page Last Day on Mars, ages 9-13, 2018.

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Pros

• 352 pages stated
• Ages 9 - 13 years stated
• Book 1 of 3 stated

Cons

• 352 pages, long
• 2018, not the newest
• Book 1, start of series

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More picks to compare

• Mad Scientist240 pages, 2017, Bloemer.Check on Amazon
• Lost Space Treasure108 pages, 2022, Knightly.Check on Amazon

Compare the picks

Specifications are manufacturer rated as listed, collected 17 October 2026.

How we scored them

The Shelf Score weighs fit, content, value and age guidance. Age guidance here means the stated reading age. No listing states a warranty. How we pick explains the weights.

Scores run from 9.2 to 9.8: each book’s point total is placed on that range, so more points always means a higher score. Reading age or level counts on a list where at least one listing gives one, and a book whose listing gives none then scores zero on it. Where no listing gives one, the score is taken over the other 85 points. Books carry no warranty, so warranty is not scored.

How to choose the best science fiction books for 11 year olds

Reading age

Choose Your Own Adventure is ages 7-10; Percy Jackson is ages 9+. Match the age. For more middle grade, see our middle grade books.

Format

Percy Jackson is a 5-book set; the rest are single novels. A set keeps them reading. For fantasy, see our fantasy books.

Series

Last Day on Mars is book 1 of 3; the rest stand alone. A series gives more to read.

Before you buy

Frequently Asked Questions

Which is the longest?

The Percy Jackson set has 1920 pages, the most here.

Which is the newest?

The Percy Jackson set is 2023.

Which is a series?

Last Day on Mars is book 1 of 3.

Still deciding? Our top pickPercy Jackson Set

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Related lists

See all kids and teens lists. Also see our fantasy books.