Today's US Kindle Daily Deal is up to 80% off a bunch of non-fiction/science books. According to the little counter at the corner of the first page, there are 152 of them. I found a couple that I had been wanting in there, and a couple that I didn't know I wanted on the way to the ones I did <grin>, so their sale did its job.
link:
https://www.amazon.com/b/ref=KCdls_b...d_i=7078878011