Technical Writer/Diety. Wrote the extremely helpful books Thinking in C++ and Thinking in Java. Both books (and drafts of his new ones) are available for free in PDF form at his website, He can afford to do this, since he makes most of his money by giving seminars.

A much better strategy, in my opinion, than those "How to buy real estate for no money down" seminars that are given for free, but try to get you to pay $119.95 for the instruction book.