My dad is currently reading a book on retirement savings - unfortunately I didn't catch the authors name, but some of the ideas my father told me about made me a little nervous (a paid off house is money under the mattress, better to pull some out and invest it). I know very little about financial planning when you are just starting a traditional retirement (age 64), but at the very least I want to push him in the direction of mustachian-approved books.
Any suggestions?