I'm close but I probably won't make it, at least partially by choice.
I've started what should be my last challenge book (
The King's Revenge: Charles II and the Greatest Manhunt in British History), but I've had too much going on to give it much time. I could either try to speed it up (but I like it a lot and that would mean giving it less than my full attention) or abandon it for now and pick the shortest possible qualifying book and squeeze that in. But I have company who'll be here through the new year and I think the best choice in terms of my reading pleasure and enrichment is to acknowledge that I'll be a book short. I've surpassed all my other goals, so I'm content; I just won't have bragging rights.