I've only acquired 1 new book so far this month which wasn't planned, but... it is a book that's due to come out on January 1st and which I had on preorder. As it happens, it's one of this month Kindle First selections so getting it for free is better

Plus it means that I won't start 2017 with a purchase on the 1st day

I had some no-rush credits to cover the preorder so I can now spend that on something else...