A RESPONSE TO SIMON B

In a recent post, I mentioned a book I had read some time ago about the design of common objects, like the paper clip and the pop top can.  Simon B. asked for the reference.  Well, it took a good deal of Googling, but I have come up with it.  The book is Invention By Design, and the author is Ed Buch, who turns out to be a professor at Duke, in  the next town over from mine.  I found it a really fun read.