It's refreshing to finish a book and find myself thinking, gosh, I wish this book had been longer. I wish the author had slowed down and gone more in-depth on some things. As opposed to the feeling I have all too often: well, that book needed some serious deleting.
The Humans is a fun book, fairly predictable in plot, but enjoyable enough in execution that predictability doesn't really matter. Our unnamed narrator is from another planet, part of a much more highly evolved species than humans, who's been sent to earth on a mission to prevent humans from developing a level of mathematic insight that could be devastating to them. To do so, he must appear as a human himself, and that's where the adventure begins.
I'm sure, just from that description, you can figure out half the story. But our unnamed narrator is unintentionally droll in his observations about humans:
"On Earth, incidentally, civilization is the result of a group of humans coming together and suppressing their instincts."
The only other quibble I had is towards the end, the narrator compiles a list of suggestions for humans to appreciate their lives more. One item on that list is about not spending more time at work than you have to. The narrator spends very little time looking at the American work life, so that felt like an authorial comment.
But again. You want a quick, fun read? This one will do.