Andrea Talbot travels back in time and finds herself up in a dangerous underground adventure in the infamous tunnels under Moose Jaw.

Andrea goes back to Moose Jaw, and back to the tunnels of the past, this time to help break up a theft ring made up of some surprising criminals.

The New York Times Bestseller! The story of an outcast boy, his eccentric dad, and the scary underground world they discover through secret TUNNELS.14-year-old Will Burrows has little in common with his strange, dysfunctional family. In fact, the only bond he shares with his eccentric father is a passion for archaeological excavation. So when Dad mysteriously vanishes, Will is compelled to dig up the truth behind his disappearance. He unearths the unbelievable: a secret subterranean society. "The Colony" has existed unchanged for a century, but it's no benign time capsule of a bygone era--because the Colony is ruled by a cultlike overclass, the Styx. Before long--before he can find his father--Will is their prisoner....

Andrea has to go back to the Moose Jaw tunnels to rescue two of her friends who have fallen into the hands of those who exploit immigrant workers.

Ziggy and the rest of the Black Dinosaurs are thrilled to find out that there is a tunnel under their school that was once used by the Underground Railroad, and decide to check it out.

Andrea and her brother Tony are back in the tunnels, coming face to face with a new tyranny known as the Ku Klux Klan.

The end to end all ends: The epic finale to the NEW YORK TIMES bestselling TUNNELS series! Total Termination of the English: The Styx and their lethal cohorts of Armagi will settle for nothing less. Not even the mighty US military is strong enough to stop the assault!Will and Elliott flee back underground, down to the innards of the Earth first mapped in DEEPER and FREEFALL. With the support of a small team that survived the plague of New Germania, they discover a secret at the site of the three core pyramids. A secret that may explain not only where the Styx came from, but the human race, too. Can Elliott, with her mixed blood, unlock the clues before Earth itself spins out of orbit?All the many threads of the prior TUNNELS books come together in this epic conclusion!