Really gripping stuff. I was hooked right from the in media res opening (someone's dead, someone else is a bit stabbed, and lord knows if the plane has enough gas in the tank).

It's just a quick novella, so I'll spare any specific details. Basically, though, the premise is that an ecological catastrophe has befallen the earth in the near future, and "World Health" is attempting to use a novel time travel method to recover from it.

Because of the brief length of the book the action skips along pretty quickly, though a few potentially interesting details and plot points are given short thrift.

The best short SF from 2019 that I've come across, so far.