The haunted toolshed
Dave Keane.
A super-sleuth fourth grader solves the case of a neighbor's haunted toolshed.
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Encyclopedia Brown and the case of the dead eagles
by Donald J. Sobol

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The case of the missing marquess : an Enola Holmes mystery
Nancy Springer.
Enola Holmes, much younger sister of detective Sherlock Holmes, must travel to London in disguise to unravel the disappearance of her missing mother.
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Chasing Vermeer
by Blue Balliett
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 red blazer girls : the ring of Rocamadour
Michael D. Beil.
Catholic-schooled seventh-graders Sophie, Margaret, Rebecca, and Leigh Ann help an elderly neighbor solve a puzzle her father left for her estranged daughter twenty years ago.
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Mystery at Discovery Lake
Renae Brumbaugh.
When Elizabeth, Alexis, Bailey, Sydney, McKenzie, and Kate end up as roommates at summer camp, they soon suspect there's more going on than crafts and Bible quizzes.
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Gilda Joyce, psychic investigator
by Jennifer Allison.
During the summer before ninth grade, intrepid Gilda Joyce invites herself to the San Francisco mansion of distant cousin Lester Splinter and his thirteen-year-old daughter, where she uses her purported psychic abilities and detective skills to solve the mystery of the mansion's boarded-up tower.
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The puzzling world of Winston Breen
Eric Berlin.
Puzzle-crazy, twelve-year-old Winston and his ten-year-old sister Katie find themselves involved in a dangerous mystery involving a hidden ring. Puzzles for the reader to solve are included throughout the text.
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The fall of the Amazing Zalindas
by Tracy Mack and Michael Citrin
The ragamuffin boys known as the Baker Street Irregulars help Sherlock Holmes solve the mysterious deaths of a family of circus tightrope walkers.
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Cat among the pigeons : a Cat Royal adventure
by Julia Golding.
Catherine "Cat" Royal, an orphan who lives at the Drury Lane Theater in 1790s London, rallies her friends to try to save Pedro from the clutches of Mr. Hawkins, a slavemaster who considers Pedro his property.
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The Third Pig Detective Agency
Bob Burke.

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Eye of the crow
Shane Peacock.
A woman is found stabbed to death in London. A young boy is drawn to the scene to investigate the murder and becomes a suspect himself.
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Cam Jansen and the mystery of the stolen diamonds
David A. Adler
A fifth-grader with a photographic memory and her friend Eric help solve the mystery of the stolen diamonds.
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Harriet, the spy.
Fitzhugh, Louise.

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From the mixed-up files of Mrs. Basil E. Frankweiler
written and illustrated by E.L. Konigsburg.

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Lost treasure of the emerald eye
Geronimo Stilton
The discovery of an old map by his sister Thea leads Geronimo and his family to search for buried treasure on a faraway island.
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Sammy Keyes and the hotel thief
by Wendelin Van Draanen.
Thirteen-year-old Sammy's penchant for speaking her mind gets her in trouble when she involves herself in the investigation of a robbery at the "seedy" hotel across the street from the seniors' building where she is living with her grandmother.
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The boxcar children
by Gertrude Chandler Warner

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NERDS : National Espionage, Rescue, and Defense Society
Michael Buckley
While running a spy network from their elementary school, five unpopular misfits combine their talents and use cutting-edge gadgetry to fight evil around the world.
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