http://mppl.org/services/youth-department/good-books/?list=Mystery+Novels+for+Grades+4-6&category=grades+4-5
List: Mystery Novels for Grades 4-6
The case of the time-capsule bandit
Twelve-year-old Randi, unhappy about moving from Brooklyn to Deer Creek, Tennessee, after her mother's death, soon finds new friends and a case to solve surrounding a stolen time capsule and rumors of a centuries-old treasure.
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The Harlem charade
Seventh-graders Jin, Alexandra, and Elvin come from very different backgrounds and circumstances, but they all live in Harlem, and when Elvin's grandfather is attacked they band together to find out who is responsible--and the search leads them to an enigmatic artist whose missing masterpieces are worth a fortune, and into conflict with an ambitious politician who wants to turn Harlem into an historic amusement park.
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Cat detective
In ancient Egypt, the Pharaoh's pampered cat Ra and his scarab-beetle sidekick question the royal palace's animal inhabitants, solve a crime, and exonerate a servant girl falsely accused of theft.--
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The great Greene heist
Jackson Greene has a reputation as a prankster at Maplewood Middle School, but after the last disaster he is trying to go straight--but when it looks like Keith Sinclair may steal the election for school president from Jackson's former best friend Gabriela, he assembles a team to make sure Keith does not succeed.
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The Parker inheritance
Twelve-year-old Candice Miller is spending the summer in Lambert, South Carolina, in the old house that belonged to her grandmother, who died after being dismissed as city manager for having the city tennis courts dug up looking for buried treasure--but when she finds the letter that sent her grandmother on the treasure hunt, she finds herself caught up in the mystery and, with the help of her new friend and fellow book-worm, Brandon, she sets out to find the inheritance, exonerate her grandmother, and expose an injustice once committed against an African American family in Lambert.
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Mystery in the mansion
Carlos and his friends must uncover who is sending death threats to a wealthy eccentric or Carlos' mother may lose her business, and the reader decides which clues they will follow.--Provided by Publisher.
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Belly up
Twelve-year-old Teddy investigates when a popular Texas zoo's star attraction--Henry the hippopotamus--is murdered.
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Chasing Vermeer
When seemingly unrelated and strange events start to happen and a precious Vermeer painting disappears, eleven-year-olds Petra and Calder combine their talents to solve an international art scandal.
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The disappearance of Emily H.
Eighth-grader Raine, a new girl at Yielding Middle School, uses her supernatural ability to see other people's memories to solve the disappearance of a teenaged girl.
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Floors
Ten-year-old Leo's future and the fate of the extraordinary Whippet Hotel, where his father is the maintenance man, are at stake when a series of cryptic boxes leads Leo to hidden floors, strange puzzles, and unexpected alliances.
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The Great Shelby Holmes
Nine-year-old Shelby Holmes, the best detective in her Harlem neighborhood, and her new easy-going friend from downstairs, eleven-year-old John Watson, become partners in a dog-napping case.
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Greenglass House
At Greenglass House, a smuggler's inn, twelve-year-old Milo, the innkeepers' adopted son, plans to spend his winter holidays relaxing but soon guests are arriving with strange stories about the house sending Milo and Meddy, the cook's daughter, on an adventure.
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A Hitch at the Fairmont
When his aunt is kidnapped, an eleven-year-old boy staying at San Francisco's Fairmont Hotel in 1956 tries to find her, with the help of Alfred Hitchcock.
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Kid lawyer
With two attorneys for parents, thirteen-year-old Theodore Boone knows more about the law than most lawyers do. But when a high profile murder trial comes to his small town and Theo gets pulled into it, it's up to this amateur attorney to save the day.
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Last shot : a Final Four mystery
After winning a basketball reporting contest, eighth graders Stevie and Susan Carol are sent to cover the Final Four tournament, where they discover that a talented player is being blackmailed into throwing the final game.
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The London Eye mystery
When Ted and Kat's cousin Salim disappears from the London Eye ferris wheel, the two siblings must work together--Ted with his brain that is "wired differently" and impatient Kat--to try to solve the mystery of what happened to Salim.
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Murder is bad manners
At an English boarding school in the 1930s, crime-solving friends Hazel Wong and Daisy Wells struggle to find an exciting mystery to investigate and hit pay-dirt when Hazel discovers the dead body of Miss Bell, the science teacher.
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Pie
After the death of Polly Portman, whose award-winning pies put the town of Ipswitch, Pennsylvania, on the map in the 1950s, her devoted niece Alice and Alice's friend Charlie investigate who is going to extremes to find Aunt Polly's secret pie crust recipe. Includes fourteen pie recipes.
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The scandalous sisterhood of Prickwillow Place
"Seven very proper Victorian young ladies conspire to hide a murder from the authorities at their boarding school"--
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Scat
Nick and his friend Marta decide to investigate when a mysterious fire starts near a Florida wildlife preserve and an unpopular teacher goes missing.
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Three times lucky
Washed ashore as a baby in tiny Tupelo Landing, North Carolina, Mo LoBeau, now eleven, and her best friend Dale turn detective when the amnesiac Colonel, owner of a café and co-parent of Mo with his cook, Miss Lana, seems implicated in a murder.
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Under the egg
Her grandfather's dying words lead thirteen-year-old Theodora Tenpenny to a valuable, hidden painting she fears may be stolen, but it is her search for answers in her Greenwich Village neighborhood that brings a real treasure.
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Unstoppable Octobia May
In 1953 ten-year-old Octobia May lives in her Aunt's boarding house in the South, surrounded by an African American community which has its own secrets and internal racism, and spends her days wondering if Mr. Davenport in room 204 is really a vampire--or something else entirely.
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Who could that be at this hour?
Thirteen-year-old Lemony Snicket begins his apprenticeship with S. Theodora Markson of the secretive V.F.D. in the tiny dot of a town called Stain'd By The Sea, where he helps investigate the theft of a statue.
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Woof
Bowser is a mutt, just adopted by eleven-year-old Birdie Gaux and her grandmother, but when they all get home to Grammy's bait and tackle shop in the bayou they discover that their prize stuffed marlin has been stolen--so Bowser decides to investigate, and things quickly become complicated and dangerous.
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