The Case of the Peculiar Pink Fan: An Enola Holmes Mystery by Nancy Springer, 9780142415177 2010-05-13

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The Case of the Left-Handed Lady by Nancy Springer, 9780142411902 2008-05-15

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The Case of the Cryptic Crinoline: An Enola Holmes Mystery by Nancy Springer, 9780142416907 2011-11-10

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The Case of the Bizarre Bouquets by Nancy Springer, 9780142413906 2009-05-14

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The Case of the Gypsy Goodbye: An Enola Holmes Mystery by Nancy Springer, 9780142418888 2011-11-10

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The Case of the Missing Marquess by Nancy Springer, 9780142409336 2007-11-08

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Once Upon a Crime by Robin Stevens, 9780241419830 2021-08-05

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Wave Riders by Lauren St John, 9781509874248 2021-06-10

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The Lost Twin (Scarlet and Ivy, Book 1) by Sophie Cleverly, 9780007589180 2015-02-23

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Villains in Venice (Taylor and Rose Secret Agents 3) by Katherine Woodfine, 9781405293266 2020-08-06

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Twitch by M. G. Leonard, 9781406389371 2021-06-03

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The Silver Serpent (Agatha Oddly, Book 3) by Lena Jones, 9780008211950 2019-08-19

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Spy School Goes South by Stuart Gibbs, 9781481477864 

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The House with a Clock in Its Walls by John Bellairs, 9780451481283 2018-08-28

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Scooby-Doo! Beginner Mysteries: Creepy Cowboy Caper by Michael Anthony Steele, 9781496547729 

A Spoonful of Murder: A Murder Most Unladylike Mystery by Robin Stevens, 9780141373782 2018-02-08

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Spy School Secret Service by Stuart Gibbs, 9781481477833 

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The Fowl Twins by Eoin Colfer, 9780008324810 2019-11-05

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Shadow Jumper by J. M. Forster, 9780993070907 

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Murder at the Museum (Agatha Oddly, Book 2) by Lena Jones, 9780008211899 2019-03-07

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The Ruby in the Smoke by Philip Pullman, 9781407191058 2018-09-06

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Spy Camp by Stuart Gibbs, 9781442457546 

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The Whispers in the Walls (Scarlet and Ivy, Book 2) by Sophie Cleverly, 9780007589203 2015-11-05

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The Bad Luck Lighthouse by Nicki Thornton, 9781912626304 2019-07-04

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CHERUB: Shadow Wave: Book 12 by Robert Muchamore, 9780340999745 2011-05-05

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Dragon Detective: Catnapped! by Gareth P. Jones, 9781788951678 2020-02-06

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Legacy of the Inventor: A Timmi Tobbson Children's Adventure Book by J I Wagner, 9783963267727 

The Mary Celeste: An Unsolved Mystery from History by Jane Yolen, 9780689851223 2002-07-01

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The Boxcar Children Mysteries Boxed Set #13-16 by Gertrude Chandler Warner, 9780807508343 

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The Jewelled Moth by Katherine Woodfine, 9781405276184 2016-02-25

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