https://www.stephenunwin.com/home-1 daily 1.0 2025-11-22 https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/caa6a440-4c68-4ce8-9f9a-5264ba479334/TIME_WALL_Cover_kindle+copy-1.jpg Home - It’s about Time: The final book of the trilogy is here In this final standalone tale from the world of One Second Per Second, civilization is in ruins from the unintended consequences of time travel. As societies around the globe collapse and history itself becomes the plaything of the empowered few, Joad Bevan knows that the most terrifying consequences of the strange, new physics are still to come. Yet out of this chaos emerges the hope that he can find the woman he has loved across timelines. Now the cataclysm of time’s ending is getting close, but a handful of physicists believe they have found a loophole in the laws of nature that might allow humankind to survive. It’s a long shot and time is running out... literally. “Once again, Unwin has combined startlingly original Sci Fi with a pulse-accelerating thrill ride. ” — Rob Grant, co-creator of the Red Dwarf television series “Unwin is a master in the time-travel arena.” — Guy P. Harrison, bestselling author of Damn You, Entropy! and At Least Know This https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/1b199938-c611-43c5-850f-640aa6602691/Magni_cover_PacificNorthwest_final.png Home Now available on Amazon, a techno-thriller from S.D.Unwin: The Magni https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/c07f2d2b-74cc-44cf-ab79-e9c50f7b8f6f/FOT-Audiobook-release-2.png Home The audiobook of Fall Of Time is now available from your favorite vendor. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/1577477553278-RDYDKYW8S3PE1693HUAZ/image.jpg Home - Communicate Or be added to my mailing list https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/1618175146906-ZQ70IWQSWBMQD3UHY36G/one+second+per+second+kindle+cover.jpg Home - Audiobook and CD now available "I thoroughly enjoyed it—a terrific Time romp that takes a hefty mallet to the Butterfly Theory and leaves it splattered in the road. Really good read." — Rob Grant, creator of the Red Dwarf television series https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/1577477158562-OVYRO5KC7TWRRUW0GI69/stephenunwinlanding2.jpg Home - TEDx Talk: Existing Isn’t Everything S. D. Unwin looks at the very strange idea of probability, and how we can remember the past but not the future. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/1577409430562-YEAPZX0NUVDN0QN2YX36/9781400054787.jpg Home - And now for something entirely different … This international best seller is a roller coaster of a ride across a landscape of belief, evidence, and probability. https://www.stephenunwin.com/tedx daily 0.75 2025-07-28 https://www.stephenunwin.com/the-probability-of-god daily 0.75 2025-04-28 https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/1577409430562-YEAPZX0NUVDN0QN2YX36/9781400054787.jpg The Probability of God - Armed with the belief that nothing is beyond the reach of a little mathematics, Dr. Stephen D. Unwin takes on the big question: what are the odds that God exists? He sets out to answer this in his controversial, thought-provoking, and sometimes amusing international best seller, The Probability of God. Publishers Weekly describes Unwin’s book as representative of an “intellectual evolution” in which faith and science “are now attempting détente.” (And the author insists that the subtitle was the publisher’s idea.) https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/2990bd9b-f781-4f5e-aed9-e7cdcf90f64f/foreign-editions.jpg https://www.stephenunwin.com/about daily 0.75 2025-11-24 https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/9026d111-c683-4702-959b-b5016bd3d3dc/HSnew-smaller.jpeg About https://www.stephenunwin.com/contact daily 0.75 2025-01-19 https://www.stephenunwin.com/osps daily 0.75 2025-07-12 https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/dbffe66a-0482-40ab-a6e1-922a0afa71ab/osps_trilogy_clouds.png https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/07ebf854-e1ad-452e-8d1d-95ec095ae8ea/To-Upload-Tril-OSPS_Cover_kindle.jpg One Second Per Second The greatest scientific challenge of our age wasn’t to enable time travel, it was to prevent it. The laws of physics had turned out to be idiotic, erecting no barriers to hopping time. In fact, they make it hard to avoid. I’m in the business of preserving the timeline—making sure the world sticks to the sacred rule of One Second Per Second, and that history unfolds according to plan. The problem is, there is no plan until I make it. "I thoroughly enjoyed it—a terrific Time romp that takes a hefty mallet to the Butterfly Theory and leaves it splattered in the road. Really good read." — Rob Grant, co-creator of the Red Dwarf television series "Unwin seems to have had quite a lot of fun engineering the plot’s Mobius strip twists and turns... [The hero’s] refreshing attitude helps wind the mainspring of an SF subgenre that’s grown a bit lax from overuse... If Michael Crichton’s 1999 novel Timeline had starred as astringent a lead character as Joad, maybe its 2003 movie adaptation would have been better... Original touches and a misanthropic protagonist keep this clever time-travel tale ticking along nicely." — Kirkus Reviews https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/c243e25a-f21f-47c4-b256-31ee00ef6af1/To-Upload-Tril-FoT_Cover_kindle.jpg One Second Per Second In this sequel to One Second Per Second, the saga continues of a broken universe where time travel is easier to achieve than to avoid. Now, the battle lines are drawn. To some, the continual rewriting of history is nihilistic insanity. To others, travel in all four dimensions—including time—is an inalienable right bestowed on humankind by the new natural order. Forces are amassing on either side of the conflict as the collapse of time itself is imminent. Surprisingly, not everyone is allowing this to bother them. “Complicated cause-and-effect shenanigans put a fresh spring in the step of time-travel SF. ... Unwin’s Vonnegut-type sense of humor about the essential absurdity of the situation yields some murky intrigues, double crosses, traps, and betrayals leapfrogging across the ages.” — Kirkus Reviews https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/17d0e28a-65ab-4a2e-ac6f-e9602bc885f4/TIME_WALL_Cover_kindle+copy-1.jpg One Second Per Second In this final standalone tale from the world of One Second Per Second, civilization is in ruins from the unintended consequences of time travel. As societies around the globe collapse and history itself becomes the plaything of the empowered few, Joad Bevan knows that the most terrifying consequences of the strange, new physics are still to come. Yet out of this chaos emerges the hope that he can find the woman he has loved across timelines. Now the cataclysm of time’s ending is getting close, but a handful of physicists believe they have found a loophole in the laws of nature that might allow humankind to survive. It’s a long shot and time is running out... literally. “Once again, Unwin has combined startlingly original Sci Fi with a pulse-accelerating thrill ride. ” — Rob Grant, co-creator of the Red Dwarf television series “Unwin is a master in the time-travel arena.” — Guy P. Harrison, bestselling author of Damn You, Entropy! and At Least Know This https://www.stephenunwin.com/out-about daily 0.75 2025-11-23 https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/77071856-3820-42bb-a589-5d6b1b20616b/IMG_0604.jpg Gallery Talking about careers in science with some very smart high school students at the Columbus (Ohio) Center of Science and Industry. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/a6e31606-f53f-4cf5-84d3-1819371b2b84/026_23A.JPG Gallery I enjoy book signings. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/02d3edf4-bed8-4e54-a292-e46174d98cad/022_19A.JPG Gallery Giving a book talk in Dayton, Ohio. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/b8c27d5a-1d52-47d9-ac67-8b60ec8028c9/00000000_0000000C.jpg Gallery Giving a talk on a topic I don't recall at a location I can't remember. (It may have been around the Holidays season.) https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/9edf53c2-f1ea-49fb-9845-78a2157b0631/Cnv0026.jpg Gallery Taking a stroll with Paul Davies (physicist and author) in Ann Arbor, Michigan. Paul was a mentor in my academic research days. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/c7b0d76f-970a-4c64-acc0-e5018f0e0e2b/SDUnwin_Chihuly-3.png Gallery My recent audition for Bond was a disaster. (Seattle) https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/90db26eb-f36e-4fe6-aed2-eb02ea14ee3e/Headshot-adapt-1.jpg Gallery Maybe my first headshot, circa 2003. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/8ab0f6d6-1004-4343-920f-807401d64266/Headshot-adapt-2.jpg Gallery Another youthful headshot. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/ee5b83dc-412d-4f2b-8542-55ef0f9f3ccc/IMG_0723.jpg Gallery Me (on the right) in my theoretical physics years. https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/023641c6-faac-400e-be97-951e41270920/IMG_0724.jpg Gallery The University of Manchester Theoretical Physics Group, circa 1979. (I'm in the back row, second from the right, and looking unaccountably serious.) https://www.stephenunwin.com/the-magni daily 0.75 2025-04-28 https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/b1175b7b-1f94-431e-a7a9-d058b548ce3c/Magni_cover_3d-2.png The Magni Now on Amazon “A clever, complex techno-puzzle with authentic characters and a tight, smartly arranged setup… A final showdown pitting brilliant minds of the past against contemporary thinkers makes for a memorable climax.” ― Kirkus Reviews “Fleet storytelling and an outstanding, mind-bending premise power this thriller from Unwin... Throughout, scenes are fast, strong, and memorable.” ― BookLife, Publishers Weekly “Takes complex and important ethical and moral scientific questions, and somehow crafts them into a page-turning thrill ride. Visceral and cerebral. Delicious." — Rob Grant, co-creator of the Red Dwarf television series “Top-notch storytelling from a master. Magni is a page-turning technothriller that shows S. D. Unwin is a rising star in science fiction.” ― Guy P. Harrison, author of At Least Know This and Damn You, Entropy!: 1,001 of the Greatest Science Fiction Quotes https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/a290d6bc-bb0f-4588-8b13-54d9b77be123/SDU-headshot.JPG https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/dcc259f8-76ac-48c2-aa45-3a56ceb02b72/FB_ad_Grant_amazon+%281200+%C3%97+1200+px%29-2.png https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/24843394-cbd2-4706-89a5-503a4ff76e47/FB_ad_PubWeek_amazon+%281200+%C3%97+1200+px%29.png https://images.squarespace-cdn.com/content/v1/5e0547270e908962eb5c7d5c/bdb03c55-8eec-4138-9edb-1b435dec61c3/FB_ad_Kirkus_amazon+%281200+%C3%97+1200+px%29.png