Best approach to off market homes

[Michael Potts]

Hello all, I am new to investing and have yet to make a purchase. There is a home that is behind my current house that is one I have had my eye on for a long time to purchase as a rental. The home has been empty for a long time and I would like to inquire about buying it. First question is what is the easiest way to find out who owns the home when it is off market? Second question is what is the best approach to contacting the owner, one that has the best likelihood of a successful transaction? Any thoughts and insight would be very helpful. Thank you all for taking the time. 

R/ Michael