It’s been a while since I’ve posted a price drop on a non-fiction title, but tucked away in today’s Daily Deal at Kindle US is a book that looks pretty cool, and has good reviews. A Brief History of Earth: Four Billion Years in Eight Chapters, by Andrew H. Knoll, has 4.5 out of 5.0 stars, on more than 400 ratings, and it’s only $1.99 today at Kindle US. And it’s price-matched at Kobo US.