Is Area 51 a testing ground for new military aircraft, or a center for reverse engineering alien technology? The intense secrecy surrounding this Air Force base in southern Nevada has led to a wide range of speculations. Read more about the unusual phenomena surrounding Area 51 in this title for beginning readers.

Are there giant, elusive, ape-like creatures living in the Pacific Northwest? Some people claim that footprints and blurry photographs prove the existence of sasquatch, while others believe it is all a hoax. Beginning readers can consider the evidence in this captivating title.

Did you hear something? Some people think certain houses are still home to the ghosts of former residents. Others think there are natural explanations for odd noises in the night. Find out what might make a house haunted in this eerie title for young readers.

"Engaging images accompany information about UFOs. The combination of high-interest subject matter and light text is intended for students in grades 2 through 7"-- It's a bird, it's a plane, it's a ... flying saucer? Explanations of unidentified flying objects range from alien aircraft to balloons and everything in between. This informative title will make every young reader wonder: will we ever identify these objects?

Presents the mystery of haunted houses, including current theories and famous examples--Provided by publisher.

For centuries, people have searched the oceans for Atlantis. But are the ruins of the lost city buried deep below the ocean's surface? Or was this powerful city just a figment of Plato's imagination? Try to get to the bottom of it in this introductory title for young readers.

Tales of ghost ships have been around for hundreds of years. Ships adrift without a crew appear suddenly without explanation. But did the sailors simply abandon ship? Or are there supernatural causes at play? Grab this mysterious title for reluctant readers to decide for yourself.

What exactly was Stonehenge used for? The mystery of its purpose has surrounded this site for thousands of years. People have theorized it was a religious place, burial ground, or even a landing pad for alien spaceships. Construct your own conclusions about this intriguing monument with this read for young students.