Publishers Weekly: Sinn, the pseudonym for siblings Rachel Hope Cleves (Unspeakable) and Aram Sinnreich (The Essential Guide to Intellectual Property), spin an insightful and emotional story of quantum time travel in their fiction debut. It’s 11:33 p.m. on Sept. 22, 2045, when coder Nev Bourne finalizes SavePoint 2.0, an upgrade to the cutting-edge brain implant that allows users to skip back in time by five seconds. She hits run—and wakes up the morning of September 22, reliving the same day. Then, at 11:33 p.m., the same glitch resets her to the morning of September 21. So it goes: every 24 hours she travels back in time by one additional day. When she runs into notorious hacker Airin Myx, she accuses them of causing the glitch—but instead they reveal that they’ve been working with her to fix it for weeks. On a “collision course with her past,” Nev sets out to mend relationships with her needy boyfriend, domineering mother, and estranged best friend—all while falling for Airin, who’s traveling through time in the opposite direction. The authors infuse this plausible near future with clever science and heartwarming explorations of love and second chances. At the heart of this brilliant sci-fi conundrum is a deeply human story.