Thirteen-year-old D.J. gets a bad case of "gold fever" when he and Alfred accidentally discover an abandoned--and mysteriously dangerous--gold mine.

Where can black holes be found and what are they made of? Find out in this informative book that looks at many of the mysteries in the universe. Detailed facts and photos help to answer your questions about the stars and beyond.

"On-point historical photographs combined with strong narration bring the story of the first photograph of a black hole to life. Kids will learn why it was so hard to take a photo of something so dark it does not reflect light, and so far away it could barely be reached. Primary source quotations bring the amazing accomplishment to life"--

By choosing this book to unravel the secrets of black holes, you have taken your first step on a journey to the darkest corners of the universe. Perhaps you've found yourself gazing up at the sky, wondering what lies within that vast cosmic void. Whatever your reason, being here means you are one step closer to the captivating mysteries of the universe.

For fans of The Mysterious Benedict Society and The Blackthorn Key series comes an award-winning boarding school mystery about twelve year old Emmy, who's shipped off to a prestigious British school. But her new home is hiding a secret society ... and it may be the answer to Emmy's questions about her missing father. With a dad who disappeared years ago and a mother who's a bit too busy to parent, Emmy is shipped off to Wellsworth, a prestigious boarding school in England, where she's sure she won't fit in. But then she finds a box of mysterious medallions in the attic of her home with a note reading: These belonged to your father. When she arrives at school, she finds the strange symbols from the medallions etched into walls and books, which leads Emmy and her new friends, Jack and Lola, to Wellsworth's secret society: The Order of Black Hollow Lane. Emmy can't help but think that the society had something to do with her dad's disappearance, and that there may be more than just dark secrets in the halls of Wellsworth... Pick up the Black Hollow Lane series for your 5th grade and middle school students, kids 9-12, and young readers who love twisty mysteries with: Boarding schools Secret societies Cryptic letters Secret relics A fantastic group of friends

Explores the phenomenon of black holes, explains why astronomers think they exist, what causes them, what they are like inside, and the search to find black holes in space.

A week’s vacation goes terribly wrong for four young people when hoodlums kidnap and leave three of them tied and gagged two hundred and fifty feet underground in an old, abandoned mine shaft. Charlie and Jennifer are forced to find a way to rescue their friends before it becomes too late. With a limited supply of water available and cave-ins that threaten to trap all five of them underground, the group struggles through dust, lack of air, and a desire to be free again.