Remember Adventures Among the Toroids by B. M. Stewart? Way back in 2008 I borrowed a copy from the university library and built a number of its models, writing about them in a couple of blog posts. Ten years later I built some toroids virtually, using the Antiprism software, and I wrote some blog posts about them too.
(The mentioned Google Drive folder is no more, but here is an un-curated folder full of toroid stuff, it probably has everything that was there: Toroids.tar.gz)
Recently a Numberphile video reminded me of Stewart’s book. I no longer can borrow books for a year from the university library, so I decided to go looking for a copy to buy. I expected, if I found it at all, to find it used at laughably high prices, and indeed I did: For instance, at this writing, here it is, 1980 edition, used, at $275. Plus shipping. There are cheaper — but still three-digit — copies on the same site, but all of them appear to be the first, 1970, edition.
But amazingly, amazonly, I also found copies of the second edition in new condition (!) for sale at a stupid low price — well, twice the price shown on the back cover, but that was the price when it was published 45 years ago, so, stupid low!

‘Adventures Among the Toroids’ by B. M. Stewart
I guess maybe they bought up Stewart’s unsold copies at some point? They have more.
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