With Christmas approaching, you may be looking for gift ideas so I thought I would pass on this advertisement:
The book concerned is a First Edition of the Continental Issue of Isaac Newton’s Philosophiæ Naturalis Principia Mathematica, dated 1687.
For more details see here. The estimate is “only” €100,000, which seems to me a bit on the low side. A similar volume was listed by Christie’s in 2016 as $1,000,000 to $1,500,000 but in the end sold for $3.7 million. This one has had some repairs and is slightly browned with age, but has an interesting provenance. I’d be surprised if it didn’t fetch at least a million. We’ll find out in a week!
In the Dark 