''This shape prevents the fingers becoming cramped while writing and also the possibility of their rolling from the desk."
...Most writers do not worry about their fingers rolling from the desk....
354 pages (not including bibliography) on the history, technology and philosophy of the common pencil and its myriad creators, refiners, producers and users. Utterly fascinating. If you enjoy that sort of thing, you should head on over to the Amazon link at Tam's and pick up a copy!
* Not to be confused with Leonard Read's libertarian (and far shorter) essay, I, Pencil. Have you read it?