We have been truly blessed with Pope Benedict XVI's teachings on these Church Fathers and compiled into a book.
In his lenten message, the Holy Father writes:
The practice of fasting is very present in the first Christian community (cf. Acts 13,3; 14,22; 27,21; 2 Cor 6,5). The Church Fathers, too, speak of the force of fasting to bridle sin, especially the lusts of the old Adam, and open in the heart of the believer a path to God. Moreover, fasting is a practice that is encountered frequently and recommended by the saints of every age. Saint Peter Chrysologus writes: Fasting is the soul of prayer, mercy is the lifeblood of fasting. So if you pray, fast; if you fast, show mercy; if you want your petition to be heard, hear the petition of others. If you do not close your ear to others, you open Gods ear to yourself (Sermo 43: PL 52, 320. 322).
This sounds like a great book for Lenten reading.