The Melchizedek Mystery?

On Wednesday Night, June 15th, at 6:30pm, we will study "Melchizedek." I've been asked to lead a study on a mysterious character from the Old Testament called Melchizedek. He is referred to in Genesis 14, Psalm 110, and in the New Testament Book of Hebrews. Melchizedek is described in these Scriptures as being a king and a priest who stands at the right hand of the Lord and is “without father, without mother, without genealogy, having neither beginning of days nor end of life.” 

     Our Wednesday Night Question of the Evening: 

           Who is this mysterious Melchizedek?