What happened to Amelia Earhart? Was there really an ancient city called Atlantis? What caused the fire in the sky over Siberia in 1908? This book features 12 puzzling mysteries, some centuries old, that remain unsolved. Yet people today still wonder about them and try to find answers. Each story includes attention-grabbing photos and fascinating facts. Sidebars go beyond the basics, and prompts invite readers to think for themselves. Additional mini-stories encourage further exploration.
Kat and Allie have been friends forever. But when Allie returns from a summer away, everything changes. Allie’s different. Too different. And Kat begins to wonder: who is this girl and what has she done with her best friend?
Sawdust in his locker and weird music on his MP3 player—someone is messing with Grady Hopkins. Determined to put an end to the pranks, Grady enlists friends Marco and Ava to help him decode anagrams left by the culprit. Will he solve the mystery before the trickster strikes again?
After a hacker breaches the school’s grading system and gives students failing grades, Grady Hopkins wants to set the record straight. Along with coders Ava and Marco, Grady follows a trail of IP addresses as he searches for the perpetrator. Will they find the truth before everyone flunks sixth grade?
When weird noises in the school’s media center have students spooked, Marco Martinez is on the case. Marco writes up a code to alert him of any ghost-like activity. But does he have more than ghosts to be afraid of?
When a mysterious lunch thief leaves behind a card with a website address, Ava Rhodes can’t help but check it out. After the site leads her to a really boring online video game, she’s even more determined. Can GPS tracking help Ava and her friends find the thief? Or will more lunches go missing?
When his little brother loses the class hamster, Marco Martinez comes to the rescue with a robot and some coding tricks. But will a robot rescue mission be enough to catch this speedy rodent?
When Ava Rhodes’s brand new tablet computer goes missing, she’s desperate to solve the mystery. Can her fellow coding club members Marco and Grady and some quick coding help her? Or is everyone a suspect?
Filming a sprint car race on the local track, Dylan Clarke captures racer Carlee Martin’s fiery accident. The more Dylan replays the video, the more he believes that there’s something suspicious about the crash. As he investigates, Dylan discovers that some of Carlee’s fellow racers might have wanted to hurt her. And, now, they’re after him too.
Michael suffers from a mysterious and painful lung disease. But he’s thrilled when a charity foundation grants his last wish—to visit the world’s only deep-water hotel. Submerged miles below the water’s surface, Michael discovers horrifying sea creatures, and a shocking secret is revealed.
Drew thought spending the summer in Florida with his little sister Maddie was the worst thing that could happen to him. He was wrong. When their plane crashes in a swampy, crocodile-infested wilderness, Drew and Maddie must rely on each other to survive.
Years in the future, the world is in the midst of an energy crisis. Best friends Liam and Grace spend their evenings sneaking around abandoned buildings. One night, they spot a man wandering in the deadly radiation zone. How can he survive? Is he an alien? A zombie? Liam and Grace have to find out.
For as long as he can remember, Hal Crabtree’s family has owned Limbo’s Diner. The patrons of Limbo’s are unique—they are dead, waiting for their final judgment. When Hal’s classmate Gwen shows up at the diner, Hal is determined to solve the mystery of her death. If he fails, the diner’s about to get full real quick.
Presents stories of crop circles, designs that appear in crop fields, often overnight. Examines the evidence of various explanations.
Presents stories of the Loch Ness monster in Scotland, examining the evidence of various explanations and hoaxes surrounding this legend.