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Amelia Earhart's Last Flight
From the Series That's Strange! (UpDog Books ™)
Aviator Amelia Earhart was flying over the Pacific Ocean when she disappeared. Did her plane fall in the water? Did she make it to an island? Explore the mystery of Earhart's final flight. Read More →
Secrets of the Sphinx
From the Series That's Strange! (UpDog Books ™)
A giant statue of a lion with a human head sits in the Egyptian desert. Why is it there? Who is it guarding? No one knows for sure. Can you solve the mystery? Read More →
That's Strange! (UpDog Books ™) — Hardcover Set
From the Series That's Strange! (UpDog Books ™)
There are so many unexplained mysteries to explore! From D.B. Cooper's sudden disappearance from a flying plane to strange ghostly events at the Stanley Hotel, readers will learn educational, Read More →
The Ghost Ship Mary Celeste
From the Series That's Strange! (UpDog Books ™)
The Mary Celeste was found drifting in the ocean. The ship was full of food and cargo, but the crew had disappeared. They were never seen again. What happened? Why did the crew leave the ship Read More →
The Haunted Stanley Hotel
From the Series That's Strange! (UpDog Books ™)
The Stanley Hotel in Colorado has a long history. Guests say they hear strange noises and see spooky things. Some people say the hotel is haunted by ghosts. No one knows for sure. Can you… Read More →
The Haunting of Bell Witch
From the Series That's Strange! (UpDog Books ™)
The Bell family thought they were being haunted. For three years, an angry ghost bothered them. It finally stopped after the father died. Did the ghost kill him? What happened to the family?… Read More →
The Mystery of D. B. Cooper
From the Series That's Strange! (UpDog Books ™)
In 1971 a man hijacked a plane and demanded parachutes and money. Then he jumped out of the plane and was never seen again. Discover the strange, unexplained story of D. B. Cooper. Read More →