Madeline wants more time-for her career as a tech startup CEO, for herself, and for her family. Lucky for her, a new and controversial procedure offers to give her just that by reducing how much she needs to sleep. The data is promising, and she's used to taking calculated risks. It seems like the right decision at the time, even if she hides it from her husband.

While Madeline scaled the corporate ladder and spent half her nights on the road, Darwin traded in dreams of winning the Nobel Prize in neuroscience for the quiet fulfillment of staying home and raising their two daughters. At least, that's what he told himself.

Initially Madeline excels to new heights. But after a bizarre encounter with a debonair man at the luxurious Stasis Hotel, she starts losing touch with reality and acting increasingly erratic, including filing for divorce. Other high achievers rumored to have undergone the same operation begin disappearing or turning up dead.

Darwin-who has his own troubled history with the procedure-suspects something nefarious is afoot and that he's among the few who can help. His life and sanity crumble as he uncovers a chilling plot by a powerful group to harness humanity's dreams for its endgame. Darwin and Madeline must each survive bloodshot escapades through cityscapes and dreamscapes to try and wake up from the nightmare before it consumes the entire planet-and maybe more than that.

Praise for Circadian Algorithms
"Night keeps the pages turning without sacrificing believable characters for his intriguing plot." -Publishers Weekly

"The book's premise is gripping from the start, but it's the strength of Night's writing that truly sells this appealing near-future world of high-tech hotels and dream-enhancing surgeries... A highly imaginative and engrossing cyberthriller." -Kirkus Reviews

"This fast-paced science fiction thriller about technology modifying the world of sleeping and dreaming is imaginative, engaging, and fun." -The BookLife Prize

"A fast-paced sci-fi thriller that prompts questions about the nature of experiential reality itself. A profound book for any enthusiast of biohacking and dreams, Circadian Algorithms is a profoundly inventive work of visionary sci-fi." -SPR

"The result is a highly recommended choice for libraries and readers interested in Robin Cook-style science dilemmas and the special brand of suspense that runs through his and similar stories of science gone awry, and individual efforts to save the world." -D. Donovan, Senior Reviewer, Midwest Book Review

"Equal parts social commentary and science just beyond our reach, the novel was like a trip through someone else's hangover in the best way." -Reedsy