I will de facto be on leave for the academic year of 2010-11. In preparation for yielding my extremely desirable pink and lavender office to some lucky colleague, I started clearing out some of the books by putting on a shelf in the hallway with a "help yourself" sign.
It probably says a lot about the profession in general and our programme in particular that Samuelson's Foundations was one of the first books taken and that Friedman's Essays in Positive Economics didn't go for quite some time.
Also, Friedman's and Stigler's Price Theory texts were taken early but Becker's wasn't, nor were either of the editions of Henderson and Quandt.
And the Modern Library edition of Smith's Wealth of Nations was gone early, but Marx was still there after some time.