Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Book is out of date. Info is dangerous!

Obviously this book was written in 2003, way before the housing bubble melt down in 2008 that is primarily caused the actions this book teaches: having more mortgages than you can chew.Obviously if you can't afford to pay the mortgages by yourself, if an economic downturn comes and all your tenants go away, your houses are going to get forclosed on you left right and center as your interest rates go up after a few years.But I guess it's easier said in retrospect.