Best Sci Fi Books for Middle Schoolers (2026): 5 Compared

A middle schooler who has finished the big dystopias is ready for the best sci fi books for middle schoolers, and the right one depends on the reader. We compared five books by listed reading age, grade level, page count and what each description says. Every detail below comes from the listings, not from our own reading.

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The picks

#	Product	Shelf Score	Buy
1	EXOSTAR by Knightly	9.7/10	Buy
2	Among the Hidden by Haddix	9.7/10	Buy
3	The Last Book in the Universe	9.7/10	Buy
4	Emma Morgan by Whitehead	9.5/10	Buy
5	Endlessly Ever After by Snyder	9.3/10	Buy

1

EXOSTAR by Knightly

Rae Knightly·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 ›

Book 1 of a six-book space opera about Trinket, a twelve-year-old who may hold the key to a lost spaceship.

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Pros

• The listing states it won the 2023 CIBA Gertrude Warner Award grand prize
• Book 1 of 6 in The Lost Space Treasure Series
• The listing gives a reading age of 10 to 12 years

Cons

• Description quotes blurbs rather than describing the plot in depth
• First in a series, so fans will want five more books
• No publisher is named in the listing

2

Among the Hidden by Haddix

Margaret Peterson Haddix·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 ›

Book 1 of the Shadow Children series, about Luke, an illegal third child hiding from the Population Police.

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Pros

• Book 1 of 7 in the Shadow Children series
• A customer-listed reading age of 10 to 12 years and grade level 3 to 7
• Dystopian premise built for discussion

Cons

• Published March 1, 2000, an older edition
• 160 pages is the shortest novel here
• First in a long series; completists face seven books

3

The Last Book in the Universe

Rodman Philbrick·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 ›

A 240-page dystopian novel about Spaz, a boy who can still read in a world that has forgotten books.

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Pros

• 240 pages with exclusive bonus content
• The listing gives a reading age of 9 to 12 years and grade level 4 to 7
• Reissue edition dated March 1, 2002

Cons

• Dystopian violence and a dying sister may need a grown-up to talk through
• 2002 reissue; check for a newer printing
• Marketing compares it to Fahrenheit 451 and The Giver

4

Emma Morgan by Whitehead

J. L. Whitehead·9.5/10 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 ›

A 288-page sci-fi adventure about Emma Morgan and parallel universes.

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Pros

• 288 pages of multiverse sci-fi adventure
• Published March 14, 2026, the newest book here
• One ordinary girl thrown into a multiverse adventure

Cons

• No reading age or grade level is stated
• Description leans on genre buzzwords over plot detail
• 288 pages with no stated reading level; preview for difficulty

5

Endlessly Ever After by Snyder

Laurel Snyder·9.3/10 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 ›

A 92-page choose-your-path picture book of fractured fairy tales, for readers ages 5 to 8.

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Pros

• 92-page choose-your-path format with fractured fairy tales
• A customer-listed reading age of 5 to 8 years and grade level Kindergarten to 3
• Book 1 of 2 in the Endlessly Adventures series

Cons

• Fairy tales, not science fiction; it fits this list least
• Reading age 5 to 8 and grade K to 3 sit below middle school
• Picture-book format for a middle-school list

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More picks to compare

• Seventh Grade vs. the GalaxySuits middle schoolers wanting a school-in-space adventure, Book 1 of 3.Check on Amazon

Compare the picks

Book details as published on each listing, collected 17 October 2026.

How we scored them

The Shelf Score weighs fit for a middle school reader, contents and edition, value, and the listed reading age or level. Four of the five listings give a reading age, three of them marked by Amazon as from customers, and three give a grade level. 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 sci fi books for middle schoolers

Start at Book 1

Three of the five are Book 1 of a series: EXOSTAR is Book 1 of 6, Among the Hidden is Book 1 of 7, and Endlessly Ever After is Book 1 of 2. Starting at Book 1 matters for series readers. Browse middle grade books for more.

Match the age band

EXOSTAR lists 10 to 12 years, Among the Hidden 10 to 12 years and The Last Book in the Universe 9 to 12 years. Endlessly Ever After lists 5 to 8 years with grade level Kindergarten to 3, which sits below middle school. Emma Morgan states no reading age at all.

Check the genre

Endlessly Ever After is fractured fairy tales, not science fiction, so it fits this list least. The other four are true SF: space opera, dystopia and multiverse adventure. Our fantasy books for middle school list covers more.

Before you buy

• Check the series number: three of these are Book 1 of their series.
• Compare the listed reading age with your reader’s age; one pick sits well below middle school.
• Read the description for tone: the dystopias here include violence and peril.

Frequently Asked Questions

Which sci-fi book should a 12 year old start with?

EXOSTAR, Book 1 of 6, with a listed reading age of 10 to 12 years.

Is Among the Hidden part of a series?

Yes. It is Book 1 of 7 in the Shadow Children series.

Is Endlessly Ever After science fiction?

No. It is a choose-your-path book of fractured fairy tales, with a reading age of 5 to 8 years.

Still deciding? Our top pickEXOSTAR by Knightly

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Related lists

See every middle grade list and all kids and teens lists.

More lists: fantasy for middle school, fantasy for middle grade and mystery for middle schoolers.