The Humans: Matt Haig

I loved this book! It centers around an alien that has come to earth to hide evidence that a mathematical hypothesis is solvable because it would greatly change the universe if humans had this knowledge. The mathematician and the person he shared his findings with are killed by the alien, but along the way, the alien falls in love with the mathematician's wife and son and isn't able to terminate them. He actually saves the son after a suicide attempt. The book continues and you realize we all feel a little alien sometimes and that life is precious, savor the moments.