The latest Classic book recommended by Christian Classics Ethereal Library is Catechetical Lectures of Cyril of Jerusalem (c.313–386).
Christian Classics Ethereal Library linked their reccommendation to a review from Lester Ruth from the Asbury Theological Seminary at the Calvin Institute of Christian Worship website, an extract of which is below:
Can a theologian be a good pastor or evangelist? Can an effective, church-growing evangelist be theological? Can a caring pastor preach doctrine in a relevant way? Is it possible for one person to be a dynamic evangelist, pastor, and theologian all at once? Many today would answer “no.”