Here’s an early look at the cover of Time Wall — final book in the One Second Per Second time travel trilogy.Available April, 2025 Now available on Amazon, a techno-thriller from S.D.Unwin:The Magni Learn More The audiobook of Fall Of Time is now available from your favorite vendor. Find out more 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 More details Communicate Or be added to my mailing list Contact or Follow Me 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. Watch Now 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. Learn More