Frequency
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.
Two groundbreaking missions. One impossible connection. What they find will shatter everything we thought we knew about our place in the universe—and open the door to humanity’s next chapter.
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Douglas E. Richards
Douglas E. Richards is the New York Times and USA Today bestselling author of science-fiction thrillers that have sold more than three million copies (see list below). Richards has been celebrated for his gripping, thought-provoking works that blend cutting-edge scientific concepts with heart-pounding narratives.
Richards burst onto the literary scene with his debut novel, "Wired,” published in 2010. The novel garnered widespread acclaim for its ingenious combination of scientific speculation and thrilling storytelling. This success set the stage for a series of bestselling novels, each marked by meticulous research, riveting plots, and characters that resonate with readers.
Frequency
Frequency consists of two books. The current recommended reading order for the series is provided below.

