This isn't the book's fault - I started reading it right before the election, and honestly I just can't go back to it at this point. I might pick it back up in the future, because it was going well, but it's going to take a long time for the associations to fade and for me to be ready for a grim description of oligarchs taking over and destroying the world (even if, as I suspect, it probably ends on a hopeful note).
If you can't read the book without knowing for sure what happens to Patches: he doesn't get sacrificed; Venus negotiates for a different familiar (not Leap, either) to provide the fealty feast.
Look, I guess I don't expect things written at the height of the Temperance movement (and the American Nativist movement!) to not be racist... but there's only so much gritting my teeth I can do through explanations of why certain races/ethnicities aren't fit to vote, and ultimately I was just not having a fun time.