Rejoice

I really liked this novel; I gave it 4 out of 5 stars. I liked that it went somewhere I wasn't expecting. It starts out with a visiting alien race who lay down the law with humanity and force them to stop being so selfish and self-destructive toward each other and the planet... then goes off in an unexpected direction.

(I was not so impressed with the way the author disrespected a couple of famous Canadian science fiction authors by very pointedly omitting their names from an in-story list of famous Canadian science fiction authors.)