Are there any 2017 ap comparative gov study books?

I found a few 2017 books for just gov, but not comparative. where can I find a 2017 comparative book? thx

You can’t; they don’t exist. Not enough students take the exam to make it profitable for the publisher to do annual updates. Besides, unless the CB updates the exam, there really is no reason to spend money on the latest edition. So get the 2016 Barron’s or Ethel Wood’s.