C.S. Lewis's introductory essay on the reading of old books is excellent and worth the price of this little book several times over. I have read this essay several times over the years and it just keeps getting truer.

As for De Incarnatione, it was very good and one is glad of the gift God gave the church in St. Athanasius at just the right time to defend the deity of Christ and thereby a robust view of the Trinity. It is repetitive, however, but this is fitting for someone who repeatedly had to make his stand against heresy and who was attempting to train others in a ready and reliable defense of the Word and Son of God, himself fully God, made flesh.