After They Fed My Nephew Iodine Solution as Syrup, I Couldn’t Take It Anymore

Saving, Loading, and Rewinding

I want books involving unlimited save-and-reload, infinite saves, endless rewinds, rewinding to a set point, timed rewinds, periodic rewinds, rewinding whenever you want; time, space, spacetime, history, all things, ancient times, the Republican era, modern times, the future, the paranormal, every type and genre. Must be a certain length.