Books About Hidden Treasures

The Best Hidden Treasures Books for Kids

By the Bookroo Editors

Looking for excellent children's books about hidden treasures? This collection brings together Bookroo's highest-rated and most useful picks in one place.

Start with our editorial favorites, then browse recommendations organized by reading stage to find the right book for your reader.

The Shortlist

Our 10 Favorite Books About Hidden Treasures

Secrets of the Purple Pearl
Sale price
$1697
Chapter Book · Ages 8–12 · 2025

Secrets of the Purple Pearl

By Kate McKinnon · Book #2 in the The Millicent Quibb School of Etiquette for Young Ladies of Mad Science series

Mad scientists seek a powerful pearl; three sisters and their mentor must stop them before chaos ensues.

256 pages· 40,458 words· Est. 5.5 hour read
4.4 Goodreads · 2,090 ratings
$17.99Save 6%
Hardcover
Summary: In the quirky town of Antiquarium, the Porch Sisters face a summer of mad science and mystery. As the Krenetics Research Association hunts for the legendary Purple Pearl to resurrect their leader, Talon Sharktūth, sisters Gertrude, Eugenia, and Dee-Dee, along with their mentor Millicent Quibb, must thwart their plans. With a mysterious Shrimpmaid and secrets of their origins at stake, can they prevent disaster and uncover the truth about themselves? Dive into a summer adventure where the stakes are as deep as Lake Kagloopy.
Charlie Thorne and the Royal Society
Sale price
$1797
Chapter Book · Ages 8–12 · 2024

Charlie Thorne and the Royal Society

By Stuart Gibbs · Book #4 in the Charlie Thorne series

A genius races to uncover Newton's secret treasure before her relentless pursuers do.

416 pages· 75,049 words· Est. 10.5 hour read
4.5 Goodreads · 1,978 ratings
$18.99Save 5%
Hardcover
Summary: Charlie Thorne, a brilliant and fearless adventurer, is on a high-stakes quest to find Isaac Newton's hidden treasure. With former CIA allies, she races across Europe and Australia, outsmarting foes and dodging danger at every turn. As she deciphers Newton's cryptic clues, Charlie must stay ahead of her relentless pursuers. Will she unlock the secrets of history's greatest mind, or will her enemies catch up? The chase is on, and the stakes have never been higher.
Empty Envelope (Turtleback School & Library)
Sale price
$1639
Chapter Book · Ages 7–9

Empty Envelope (Turtleback School & Library)

A boy receives mysterious letters meant for someone else, leading to a hidden stamp worth fifty thousand dollars and a scheme involving stolen mail and impersonation.

78 pages· 6,739 words· Est. 1.5 hour read
4.1 Goodreads · 4,070 ratings
$17.25Save 5%
Prebound-Glued
Mandie and the Trunk's Secret
Sale price
$574
Chapter Book · Ages 9–12 · 1985

Mandie and the Trunk's Secret

By Lois Gladys Leppard · Book #5 in the Mandie series

Old letters reveal secrets that test faith and courage.

128 pages· 29,859 words· Est. 3.5 hour read
4.0 Goodreads · 2,050 ratings
$5.99Save 4%
Paperback
Summary: Mandie and her friend uncover mysterious letters in the attic, leading them on a journey through hidden secrets and unexpected dangers. As they delve deeper, they must confront challenges that test their courage and faith. What truths will they uncover, and how will it change their lives? Join Mandie in a tale of discovery and growth, where the past holds the key to the future.
The Secret of the Wooden Lady
Sale price
$958
Chapter Book · Ages 8–12 · 1950

The Secret of the Wooden Lady

By Carolyn Keene · Book #27 in the Nancy Drew Mystery Stories series

Nancy Drew unravels a ghostly mystery aboard an old ship, facing fire, theft, and hidden pasts.

176 pages· 33,725 words· Est. 4.5 hour read
3.9 Goodreads · 6,425 ratings
$9.99Save 4%
Hardcover
Summary: Nancy Drew and her friends, Bess and George, board the Bonny Scot to solve its ghostly mystery. As fires blaze and thefts occur, Nancy must uncover the ship's missing figurehead to help her father secure its history. But with no records of the ship's past and a suspect from a recent robbery shadowing them, danger lurks at every turn. Can Nancy piece together the clues before it's too late?
Over Sea, Under Stone
Sale price
$858
Chapter Book · Ages 8–12 · 1965

Over Sea, Under Stone

By Susan Cooper · Book #1 in the The Dark Is Rising Sequence series

Three siblings race to find a powerful grail before darkness consumes the world.

304 pages· 75,065 words· Est. 10.5 hour read
3.9 Goodreads · 57,531 ratings
$8.99Save 5%
Paperback
Summary: On a family holiday in Cornwall, the Drew siblings—Simon, Jane, and Barney—uncover an ancient map leading to a legendary grail. As the Dark rises, they must embark on a perilous quest to secure this vital weapon for the Light. With sinister forces closing in, the Drews face a race against time that could cost them everything. Will they succeed in their mission, or will the world fall into shadow?
Arsène Lupin vs Sherlock Holmes
Sale price
$1140
Chapter Book · Ages 9–11 · 1908

Arsène Lupin vs Sherlock Holmes

By Maurice Leblanc, David Carter (Translator), Thomas Muller (Illustrator)

A cunning thief challenges a brilliant detective in a duel of wits.

288 pages· 64,954 words· Est. 9 hour read
3.8 Goodreads · 10,254 ratings
$12.00Save 5%
Paperback
Summary: In a thrilling clash of intellects, the elusive French thief Arsène Lupin faces off against the legendary detective Sherlock Holmes. In 'The Blonde Lady', Holmes races to unmask a mysterious female thief tied to Lupin. Meanwhile, 'The Jewish Lamp' reveals a stolen lamp hiding a shocking secret. As these two iconic figures engage in a battle of wits, the stakes rise, and the tension mounts. Will Holmes outsmart Lupin, or will the gentleman thief prove too clever? Dive into these classic tales of mystery and intrigue, where every clue could lead to a surprising twist.
Clever Tom and the Leprechaun
Sale price
$375
Picture Book · Ages 4–8 · 1988

Clever Tom and the Leprechaun

By Linda Shute

A leprechaun's gold promises fortune, but cleverness may outwit greed.

48 pages· 847 words· Est. 7 min read-aloud
4.5/7 Bookroo·3.8/5 Goodreads · 257 ratings
$3.95Save 5%
Paperback
Summary: Tom Fitzpatrick believes he's struck gold by capturing a leprechaun, demanding the secret to its hidden treasure. But as Tom soon discovers, the leprechaun's cunning might just outsmart his own. Will Tom's greed lead him to riches or leave him empty-handed? Dive into a tale where wit and trickery dance in a game of fortune and folly.
The Jewel in the Hub
Chapter Book · 2010

The Jewel in the Hub

By Roderick Hunt, David Hunt, Alex Brychta (Illustrator) · Book #3 in the Time Chronicles series

Can they stop the Virans from erasing history?

40 pages· 1,551 words
3.8 Goodreads · 38 ratings
Paperback
Summary: A mysterious box leads a group of friends into a battle across time. Guided by Mortlock, the Time Guardian, they must thwart the Virans' plan to destroy history. As they journey through Renaissance Italy and medieval Germany, meeting figures like Leonardo Da Vinci and Johann Gutenberg, they race to assemble the TimeWeb. But with the Virans always a step behind, can they find the missing key before it's too late? Dive into a world where the past is at stake and the future hangs in the balance.
A Dictionary of Scoundrels
Sale price
$1797
Chapter Book · Ages 8–12 · 2023

A Dictionary of Scoundrels

By Beth Lincoln, Claire Powell (Illustrator) · Book #1 in the The Swifts series

A mischievous girl hunts a killer at a chaotic family reunion.

338 pages· 75,712 words· Est. 10.5 hour read
4.1 Goodreads · 7,823 ratings
$18.99Save 5%
Hardcover
Summary: Shenanigan Swift, a spirited troublemaker, faces her biggest challenge at the Swift Family Reunion. When a relative is murdered, she defies her mischievous label to unravel the mystery. Can she redefine herself and catch the killer amid a web of secrets and wordplay? Dive into a world where names shape destinies, and Shenanigan must prove she's more than her definition.
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