Best Mystery Books Past 10 Years (2026): 4 Compared

A decade of mysteries is a lot of shelf to search, and the best mystery books past 10 years narrow it to four kid-friendly picks. We compared four books by reading age, grade level, length and series, using only what each listing publishes.

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The picks

#	Product	Shelf Score	Buy
1	Super Puzzletastic Mysteries	9.7/10	Buy
2	Notorious by Korman	9.7/10	Buy
3	Walls Within Walls by Sherry	9.6/10	Buy
4	The Tower Treasure #1	9.6/10	Buy

1

Super Puzzletastic Mysteries

Chris Grabenstein·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 ›

An anthology of 20 mystery stories with codes and puzzles, suited to ages 8-12 readers who like solving along.

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Pros

• 20 mystery stories with codes, ciphers and puzzles
• Reading age 8 - 12 years and grade level 3 - 7, both stated
• 384 pages, the longest book here

Cons

• Anthology, not a single narrative
• No series to continue
• 2021 publication

2

Notorious by Korman

Gordon Korman·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 funny, suspenseful island mystery, suited to ages 8-12 readers who like adventure and conspiracy.

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Pros

• 336 pages from HarperCollins, published 2021
• Reading age 8 - 12 years and grade level 3 - 7, both stated
• Funny, suspenseful island mystery

Cons

• Not part of a series
• The description includes a dog's death as the mystery hook
• No puzzle elements stated

3

Walls Within Walls by Sherry

Maureen Sherry·9.6/10 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 puzzle-filled apartment mystery, suited to ages 8-12 readers who like hidden treasures and secrets.

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Pros

• 368 pages of puzzles and hidden treasures
• Reading age 9 - 12 years and grade level 3 - 7 are both stated
• 2012 reprint from HarperCollins

Cons

• 2012 publication falls outside the past 10 years
• Reading age is marked as from customers
• Not part of a series

4

The Tower Treasure #1

Franklin W. Dixon·9.6/10 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 Hardy Boys series in a 2016 reissue, suited to ages 9-12 readers starting a long mystery series.

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Pros

• Book 1 of 117 in The Hardy Boys series
• Reading age 9 - 12 years and grade level 3 - 7 are both stated
• 2016 reissue with a brand-new look

Cons

• Reading age is marked as from customers
• A reissue of the 1927 original, not a new story
• 192 pages, the shortest book here

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More picks to compare

• Curse Breaker by TudhopeGamebook with puzzles, ages 9-12.Check on Amazon
• The Shadow Sleuths by LeonesDetective stories, ages 8-12.Check on Amazon
• Lost Mysteries by TowlerReal-world mysteries, ages 7+.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 the reader, contents and edition, value, and the listed reading age or grade level. All four state a reading age and a grade level; two reading ages are marked as from customers. Only one pick starts a series. 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 mystery books past 10 years

Series or standalone

The Tower Treasure is Book 1 of 117 in The Hardy Boys series, the only series starter here. The other three are standalones: Notorious, Walls Within Walls and the Super Puzzletastic Mysteries anthology. For more mysteries, see our thriller mystery books lists.

Puzzle books or adventure mysteries

Super Puzzletastic Mysteries and Walls Within Walls are puzzle-heavy: 20 code-and-cipher stories in one, a giant apartment puzzle in the other. Notorious and The Tower Treasure are adventure mysteries with conspiracies and heists. Note the dates: The Tower Treasure is a 2016 reissue of the 1927 original, and Walls Within Walls is a 2012 reprint, just outside the 10-year window.

Before you buy

• Check the edition and publication date on the listing; two of these are reissues or reprints of older books.
• Reading ages marked as from customers reflect buyer reports, not publisher guidance.
• The anthology has no series to continue; The Hardy Boys continues with more books in the series.

Frequently Asked Questions

Which book starts a series?

The Tower Treasure, Book 1 of 117 in The Hardy Boys series.

Which book has puzzles to solve?

Super Puzzletastic Mysteries, with 20 stories featuring codes, ciphers and puzzles.

Which books were published in the last 10 years?

Notorious (2021) and Super Puzzletastic Mysteries (2021). The Tower Treasure is a 2016 reissue of the 1927 original, and Walls Within Walls is a 2012 reprint.

Still deciding? Our top pickSuper Puzzletastic Mysteries

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Related lists

See every kids and teens books list and all reading guides lists.

More lists: mystery novels last 10 years, mystery novels last 5 years, quick read mystery books.