Into The Absolute Darkness

Book Description:

In the rugged Ozark Mountains of Arkansas, two Memphis State geology students—Glenn Thompson and Bob Langford—set out to solve a baffling mystery: why did water take 24 hours to travel barely a mile from where it vanished underground inside Blanchard Springs Caverns to where it reemerged at Blanchard Spring?

Denied access to the caverns by U.S. Forest Service officials, they hatched a bold plan—scuba dive directly into the uncharted spring. What they discovered revealed hidden treasures, shattered long-held scientific assumptions, and nearly cost them their lives.

With minimal gear, a single shared air tank, and a Kodak Instamatic camera sealed inside a mayonnaise jar, they descended into a world no human had ever seen. Battling violent currents, inching through suffocating tunnels, and feeling their way through pitch-black stone corridors, they advanced through the labyrinth on sheer grit and instinct. Every foot forward was a victory. Every breath could have been their last.

Expecting a reprimand when reporting their findings, they were stunned when the U.S. Forest Service recognized the magnitude of their discovery and funded further exploration. That unexpected twist launched them into a surge of subterranean adventure that reshaped their futures—and the legacy of Blanchard Springs.

Told by Glenn Thompson himself, this gripping true story of risk, resilience, and the thrill of discovery—featuring 83 color images—plunges readers into the claustrophobic darkness of the Ozarks’ underground frontier, following two unlikely pioneers as they uncover secrets only the courageous dare to seek.

Book Teaser:

“DEEP INTO THE CAVE SYSTEM, Bob and I noticed our flashlights were rapidly dimming, meaning it was past time for us to be on our way out of the cave. Due to the excitement of our big discovery, we had avoided talking about the peril we faced to get back to the Griswold Room through the underwater passage with only one tank between us and no lifeline to follow.

I planned to go first with the string tied to the tank. We knew the string was too short and would run out at least thirty-five feet before I reached the Griswold Room. When I reached the limit of the string, I would ditch the tank for Bob to pull it back, and I would swim the rest of the way, holding my breath. I would need to catch a breath from an air pocket against the ceiling to make it that far. But clearing my snorkel in a thin air pocket would be a challenge while holding my breath. If I did it wrong, I could inhale water, causing me to choke and cough.

But swimming straight in the darkness without a lifeline to follow was the biggest challenge. It is like trying to walk straight with your eyes closed. I knew if I didn’t reach the Griswold Room after one or two minutes of swimming once I’d abandoned the tank, it would mean I had swum offcourse and would likely drown.

Bob would then be on his own to MAKE IT OUT ALIVE.”

About The Author:

Glenn Thompson, PhD, is an avid spelunker, scuba diver, and adventure seeker. He received his BS in geology from the University of Rhode Island and his master’s in geology from Memphis State University. While at Memphis State, Glenn and his friend Bob Langford decided to investigate the underwater cave that fed Blanchard Spring,near the town of Fifty-Six,Arkansas. Their cave diving escapade unfolded to become a complete underwater exploration, mapping and photography project.

Glenn went on to receive his PhD from Indiana University and taught hydrogeology at the University of Arizona for seven years before starting his own company, Tracer Research Corporation. Glenn and his wife Martha live in Tucson, Arizona, and enjoy boating, diving, traveling, and spending time with family.