Behind any tool in the investor's toolkit is a sound theory. In order to take full advantage of the tools available on this site, one should understand where and when the tool is applicable. Some of the concepts within this site are covered in the book Private Real Estate Investment written by mathestate founder Roger J. Brown, CCIM, Ph.D. The menu to the left summarizes principles employed by the modern real estate investor, many of which are chapters in the book. Private Real Estate Investment is the first book to rigorously explain the dynamics of real estate investment from the standpoint of the individual investor. The included CD-ROM provides data sets, analysis tools and interactive exercises in Excel format.