unsolved mysteries ghosts

Gravity Falls: Dipper's and Mabel's Guide to Mystery and Nonstop Fun! - (Guide to Life) by Rob Renzetti (Hardcover)

The Mysterious Benedict Society Paperback Boxed Set - by Trenton Lee Stewart

The Mysteries of the Universe - (DK Children's Anthologies) by Will Gater (Hardcover)

The Mystery of Locked Rooms - by Lindsay Currie

Blackthorn Stables March Mystery St. Patrick's Day and the Lost Treasure - by Elaine Heney (Paperback)

The Desmond Cole Ghost Patrol Collection (Boxed Set) - by Andres Miedoso (Paperback)

Choose Your Own Adventure 4-Book Boxed Set #2 (Mystery of the Maya, House of Danger, Race Forever, Escape) - (Choose Your Own Adventure Box Sets)

Nancy Drew Clue Book Mystery Mayhem Collection Books 1-4 (Boxed Set) - by Carolyn Keene (Paperback)

The Mysterious Benedict Society ( Mysterious Benedict Society) (Reprint) (Paperback) by Trenton Lee Stewart

The Desmond Cole Ghost Patrol Ten-Book Collection (Boxed Set) - by Andres Miedoso (Paperback)

Mystery in Rocky Mountain National Park - (National Park Mystery) by Aaron Johnson (Paperback)

Ghost - (Track) by Jason Reynolds

Danger in Zion National Park - (National Park Mystery) by Aaron Johnson (Paperback)

Mysteries According to Humphrey - by Betty G Birney (Paperback)

Discovery in Great Sand Dunes National Park - (National Park Mystery) by Aaron Johnson (Paperback)

Case Closed: Mystery in the Mansion - by Lauren Magaziner (Paperback)

#10 Ghost Town At Sundown - By Mary Pope Osborne ( Paperback )

Enola Holmes: The Case of the Peculiar Pink Fan - (Enola Holmes Mystery) by Nancy Springer (Paperback)

The Mystery of Chimney Rock - (Choose Your Own Adventure Retro Editions) by Packard (Paperback)

Ghost Light (the Last Resort #3) - by Sara Farizan (Hardcover)

Murdle Jr.: Sleuths on the Loose - (Murdle Jr. Mysteries) by G T Karber & Chris Grabenstein

Adventure in Grand Canyon National Park - (National Park Mystery) by Aaron Johnson (Paperback)

Enola Holmes: The Case of the Missing Marquess - (Enola Holmes Mystery) by Nancy Springer (Paperback)

The Cinderella Ballet Mystery - (Nancy Drew & the Clue Crew) by Carolyn Keene (Paperback)