I bought a hardcover Le Guin anthology recently after balking a bit at the price. But then I was amazed to find it stayed open when I put it on a table and very

I bought a hardcover Le Guin anthology recently after balking a bit at the price. But then I was amazed to find it stayed open when I put it on a table and very happy to have paid the premium! Now, thanks to you, I know there is a name for this technology.