Nothing interesting happens in Diamond Falls, and that's extra true for teenagers Emma and Brody. But soon, a famous geologist will show them the wildest time of their lives. With the help of a magic cave and a mysterious girl, they must nab a piece of the rare fluorite from an English cave in 1775 and get home before they are lost in time forever

Traveling through caves, jumping through time. Nothing interesting ever happens in Diamond Falls, West Virginia, and that's doubly true for local teenagers Emma and Brody. Little do they know that their neighbor, a famous geologist, is about to show them the wildest time of their lives. When Mr. M's prized rock and mineral collection is destroyed before it can be displayed at the state museum, Emma and Brody jump at the chance to find new samples. The geologist accepts the offer, and promptly sends them back to the year 1775 to help! Back in time and across the pond in Castleton, Derbyshire, England, Emma and Brody team with a mysterious young girl named Max to recover one of the rarest minerals in the world: Blue John Fluorite. Tapping into courage they never knew they had, the formerly ordinary West Virginians must protect a cave, avoid gun-toting soldiers, and return to the present before they're trapped forever. Blue John's Cavern is the first book in the middle grade adventure/sci-fi series Crystal Cave Adventures. If you like a little excitement thrown in with your science, then you'll love Diane's fast-paced and compelling debut novel.

A spell-binding tale of magic and mysticism for young readers that explores the wonder of nature, from award-winning Berlie Doherty.

Join Emma and Brody as they leap through the Crystal Cave from modern-day West Virginia to 1775 England in search of the Blue John Fluorite. If you loved the novel Blue John's Cavern, keep the adventures going with this activity book full of secret story research, quizzes, mineral facts, puzzles, experiments, creative writing and more.

The Huautla in Mexico is the deepest cave in the Western Hemisphere, possibly the world. Shafts reach skyscraper-depths, caverns are stadium-sized, and sudden floods can drown divers in an instant. With a two-decade obsession, William Stone and his 44-member team entered the sinkhole at Sotano de San Augustin. The first camp settled 2,328 feet below ground in a cavern where headlamps couldn't even illuminate the walls and ceiling. The second camp teetered precariously above an underground canyon where two subterranean rivers collided. But beyond that lay the unknown territory -- a flooded corridor that had blocked all previous comers, claimed a diver's life, and drove the rest of the team back. Except for William Stone and Barbara am Ende, who forged on for 18 more days, with no hope of rescue, to set the record for the deepest cave dive in the Western Hemisphere.