I want to know how many books (in units sold) on real estate sold in
the US in the last ten years (1993-2003).  I would like to have the
data listed by
year and units sold.  I also need to know the same for books on the
subject of business over the last ten years.  I am putting this data
in a business plan and need to know how many persons (according to
units sold)in the
US who have in some way tried to increse their knowledge of how to buy
real estate and how many persons who have (according to units sold)
purchased books on business.