Funniest book I read on the subject was a skinny book from the
   90's - got it from the roselle park public library - and the
   whole book was the steps on "how to be a slumlord for fun and
   profit" - no, that wasn't the title, but it should have been. It
   was written by an african american man who made millions in new
   york city and newark nj. It took guts to "write it like it is".
   He didn't pull any punches. "