The 39 clues.
Watson, Jude.
Solon, Ohio : Findaway World, LLC, [2009]

The 39 clues.
Lerangis, Peter.
Solon, Ohio : Findaway World, LLC, [2009]

The 39 clues.
Korman, Gordon.
Solon, Ohio : Findaway World, LLC, [2008]

39 clues, Cahills vs. Vespers, vol. 5 :Trust no one

[United States] : Scholastic, 2012.

The Alexander cipher
Adams, Will, 1963-
New York : Grand Central Pub., 2009.

The Alexander cipher
Adams, Will, 1963-
New York : Grand Central Pub., 2009.

The Atlantis code
Brokaw, Charles.
New York : Forge, 2009.

The Atlantis code : a novel
Brokaw, Charles, author.
[United States] : Blackstone Publishing, 2020.

Beneath the veil
Dank, Micah T., author.
[United States] : Blackstone Publishing, 2021.

The Berlin Letters : A Cold War Novel
Reay, Katherine, 1970- author.
[United States] : Harper Muse, 2024.

The Berlin Letters : A Cold War Novel
Reay, Katherine, 1970- author.
[United States] : Harper Muse, 2024.

Beyond the grave
Watson, Jude, author.
New York : Scholastic Inc., 2011.

Beyond the grave
Watson, Jude.
[United States] : Scholastic, 2009.

The book of lost names
Harmel, Kristin, author.
New York : Gallery Books, 2020.
1 hold on first copy returned of 7 copies

The book of lost names
Harmel, Kristin, author.
[New York, N.Y.] : Simon & Schuster Audio, 2020.

THE BOOK OF LOST NAMES : A NOVEL
Harmel, Kristin.
[Thorndike, Maine : Center Point Large Print, 2020.]
1 hold on first copy returned of 5 copies

The book that proves time travel happens
Clark, Henry, 1952- author.
New York : Little, Brown and Company, 2015.

Cahills vs. Vespers day of doom
Baldacci, David, author.
New York, NY : Scholastic.

The case of the double cross
Bonsall, Crosby, 1921-1995.
[United States] : HarperCollins Publishers, 2012.

Catch your death
Child, Lauren, author.
Somerville, Massachusetts : Candlewick Press, 2015.

The cipher
Ford, John C. (John Christopher), 1971-
New York : Viking Juvenile, 2015.

Code of honor
Gratz, Alan, 1972- author.
New York : Scholastic Press, c2015.

Code of honor
Gratz, Alan, 1972- author.
New York : Scholastic Press, 2015.

Code of honor
Gratz, Alan, 1972- author.
[United States] : Scholastic, 2015.

Code of honor
Gratz, Alan, 1972- author.
New York, NY : Scholastic Audiobooks, [2015]

Code talker : a novel about the Navajo Marines of World War Two
Bruchac, Joseph, 1942-
New York : Dial Books, [2005]

The cypher bureau
McGinness, Eilidh, author.
[United States] : Findaway Voices, 2021.

The Dante chamber
Pearl, Matthew, author.
New York : Penguin Press, 2018.

The Dante chamber
Pearl, Matthew.
2018.

Day of doom
Baldacci, David.
Scholastic, 2013.

The dead of night
Lerangis, Peter, author.
New York : Scholastic, 2012.

The devil colony : a Sigma Force novel
Rollins, James, 1961-
New York : William Morrow, [2011]

The devil colony a Sigma Force novel
Rollins, James, 1961-
New York : HarperCollins, 2011.

The devil colony : a Sigma Force novel
Rollins, James, 1961- author.
[United States] : HarperAudio, 2011.

Doom at Grant's tomb
Wells, Marcia.
Boston ; New York : Houghton Mifflin Harcourt, [2016]

Doom at Grant's tomb
Wells, Marcia.
Harcourt Childrens Books, 2016.

The doomsday key
Rollins, James, 1961-
[United States] : HarperAudio, 2009.

The doomsday key a [upper case Greek letter "sigma"] sigma force novel
Rollins, James, 1961-
New York : William Morrow, [2009]

The double helix
Trueit, Trudi Strain, author.
Washington, D.C., U.S.A. : National Geographic, [2019]

The dragon's blood
Trueit, Trudi Strain, author.
Washington, DC : National Geographic, [2021]

The emperor's code
Korman, Gordon.
[New York] : Scholastic Audiobooks, 2010.

The Enigma affair : a novel
Lovett, Charlie, 1962- author.
[United States] : Blackstone Publishing, 2023.

The Enigma game
Wein, Elizabeth, author.
Los Angeles : Hyperion, 2020.

The explorer's code
Hymas, Allison K., author.
New York : Imprint, 2020.

The finisher
Baldacci, David, author.
New York, NY : Scholastic Audiobooks, [2014]

The forbidden island
Trueit, Trudi Strain, author.
Washington, DC, U.S.A. : National Geographic, [2022]

The forbidden island
Trueit, Trudi Strain, author.
[United States] : Disney Book Group, 2022.

The great Shelby Holmes and the coldest case
Eulberg, Elizabeth, author.
New York : Bloomsbury Children's Books, 2018.

The haunted lighthouse
Warner, Penny.
New York : Egmont USA, [2012]

The hunt for the missing spy
Warner, Penny.
Minneapolis : Darby Creek, [2016]