-- Anthony Burgess
I have a growing problem ... this is 3 out of the 16 shelves of my unread book pile, as of 7th March 1996. I buy faster than I read. (We both do. So much so, we've since built a bigger house.) And it's a stack: I tend to read the ones I've bought most recently. Some of those books have been there a long time.
Michael Kozlowski : The only difference between us and you is that you're still clinging to your delusions.
-- rec.arts.sf.written, 1999
Kevin Maroney : Do they do that?
William December Starr : Once they attain sufficient mass for gravitational collapse to take place, yes.
-- rec.arts.sf.written, 2000
-- Teresa Nielsen Hayden, rec.arts.sf.fandom, Jan 2001
For some advice on bookshelf building, Up the Walls of the World isn't as helpful as it might have been, whereas book-eating bookshelves helps a bit. It's obviously a common problem:
In order to attain these advantages, two conditions are fundamental. First, the shelves must, as a rule, be fixed; secondly, the cases, or a large part of them, should have their side against the wall, and thus, projecting into the room for a convenient distance, they should be of twice the depth needed for a single line of books, and should hold two lines, one facing each way. Twelve inches is a fair and liberal depth for two rows of octavos. The books are thus thrown into stalls, but stalls after the manner of a stable, or of an old-fashioned coffee-room; not after the manner of a bookstall, which, as times go, is no stall at all, but simply a flat space made by putting some scraps of boarding together, and covering them with books.
-- William Gladstone, On Books and The Housing of Them