A mind-bending trip across the multiverse in which scientst/spy Dran Florrian, his ex-wife, Karen, and all their analogues in other timelines try to prevent a terrible disaster which could destroy all worlds. In fact in might be happening right now. Dran has to keep his creation, Palimpsest, from the hands of Harlan Dorric, who wants to weaponise it.From a futuristic world, to a steampunky airship world as D'ren Florein, this drills down through the multiverse, keeping up the pace and dramatic tension as our hero finally figures it out. There are some great ideas in this and a solution that works for me.