I read somewhere that Silverstein was something of a book collector, which is why his work only seems to be in big hardcovers with thick pages. I suppose that hasn’t changed? He was also a sometimes-contributor to Playboy, if the notion of an adult book is unusually surprising.
In other news:
http://www.collegehumor.com/post/6477715/if-new-shel-silverstein-books-were-released
