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(as of Nov 04, 2026 01:35:43 UTC – Details)

From multimillion-copy bestselling authors Douglas E. Richards and Joshua T. Calvert comes a high-stakes science fiction thriller about a neuropsychiatrist investigating an epidemic of mass suicides and NASA astronauts uncovering an impossible secret beneath the ice of Jupiter’s moon Europa.
An epidemic of suicides. A mystery buried in Jupiter’s icy moon. A revelation for the ages.
Dr. Alexandra Lennox, a brilliant neuropsychiatrist, rushes to the jungles of Colombia to investigate a terrifying surge in collective psychotic events—groups of healthy people suddenly gripped by visions, catatonia, and inexplicable mass suicides. Teaming with rugged ex-archaeologist Ethan Calloway, she braves treacherous territory to unravel the mystery as the death toll climbs. But the phenomenon is spreading fast. Can they stop it before it becomes a global catastrophe?
Meanwhile, half a billion miles away, Lieutenant Jason Crowe and three other NASA astronauts, on a clandestine mission to reach Jupiter’s ice moon Europa, discover something impossible: a perfectly geometric shaft in the ice pulsing with an artificial signal every 47.5 hours.
Book 1 of 2 : Frequency
Listening Length : 11 hours and 39 minutes
Author : Douglas E. Richards, see all
Narrator : Lauren Ezzo, see all
Publication date : August 18, 2026
Language : English
Publisher : Simon Maverick
ASIN : B0H59VGH23
Version : Unabridged
Program Type : Audiobook
Best Sellers Rank: #4,740 in Audible Books & Originals (See Top 100 in Audible Books & Originals) #24 in Technothrillers (Books) #39 in Technothrillers (Audible Books & Originals) #45 in Hard Science Fiction (Books)
Customer Reviews: 4.6 4.6 out of 5 stars (2,882) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });