A parallel-universe hard science fiction thriller in which the drive that brings a crew home may have broken reality itself. Mind-bending space suspense of quantum travel, wrong Earths and one-way mistakes.They made it home. But it isn’t their Earth anymore.After a harrowing mission to the Trappist-1 system, Mark Noble and his enhanced crew return using the new spolding drive, a prototype engine that folds space to enable near-instant travel between stars. But something’s wrong. The satellites are missing. The space station is gone. And the world below looks. Untouched.As the truth sinks in, one terrifying possibility emerges: the spolding drive didn’t just bring them home. It brought them somewhere else. Now stranded in a parallel reality, with no way to call for help, the crew must retrace their path across the stars, hoping to undo what they’ve done before they’re lost forever.Publisher’s note: Replica Paradox was previously published as The Spolding Conundrum.Perfect for readers of Blake Crouch, Arthur C. Clarke and Peter Cawdron, parallel-world sci-fi thrillers packed with quantum travel, alternate Earths, and crews racing to undo the impossible.Praise for the Mark Noble: Edge of the Void Series:★★★★★ “Reads like old masters—classic hard sci-fi with emotional depth.”★★★★★ “Solid science, real people, strange situations, clever solutions, and unexpected twists. I will read more of this series.”★★★★★ “Most innovative sci-fi author I’ve read since the 50's old masters of sci-fi!”★★★★★ “Reminded me of Doctor to the Stars because of the infection.”★★★★★ “Believable characters and details, coupled with only modest ‘suspensions of disbelief’... makes me eager for the unfolding story.”★★★★★ “Fast and easy reading. Kind of like an Alien movie.”★★★★★ “Good page turner. Fun and exciting without resorting to needless violence.”★★★★★ “I haven’t been so excited about sci-fi since I first read Heinlein. This is better!”★★★★★ “Classic hard sci-fi without fluff. Reminded me of Clarke, Asimov, Bradbury.”★★★★★ “Tony writes what I call real science fiction, like the old masters.”★★★★★ “Exciting and nerve-wracking… it had me enthralled throughout the entire book.”★★★★★ “A fresh approach to aliens—finally something different than the usual invasion trope.”