Mark P. Shea (born August 5, 1958) is an American author, blogger, and speaker working in the field of Roman Catholic apologetics.
Born on August 5, 1958, and raised in Everett, Washington, Shea describes himself as a "double-jump convert[,] raised more or less as an agnostic pagan, [who] became a non-denominational Evangelical in 1979, and entered the Catholic Church in 1987".[1]