"Cornwall, England, 1818. Julia Twethewey needs a diversion to mend her broken heart, so when her cousin invites her to Lanwyn Manor, Julia eagerly accepts. The manor is located at the heart of Cornwall's mining industry, and as a guest Julia is swept into its intricate world. It's not long, though, before she realizes something dark lurks within the home's ancient halls. As a respected mine owner's younger son, Isaac Blake is determined to keep...

Tough choices loom if the world wants to go green. The United States and other countries must decide where and how to procure the materials that make our renewable energy economy possible. To build electric vehicles, solar panels, cell phones, and millions of other devices means the world must dig more mines to extract lithium, copper, cobalt, rare earths, and nickel. But mines are deeply unpopular, even as they have a role to play in fighting climate...

On the mysterious Island of Gloom, Philip, Dinah, Lucy-Ann, and Jack find themselves in the middle of a dangerous adventure in an abandoned copper mine.