This is not an easy read, for many reasons. It is saturated with citations from the first twelve-hundred years of the Church and beyond. Each page has voluminous citations and footnotes. By the time you are done you will have been exposed to the teachings of hundreds of Church Fathers and you will also have been introduced to the deep spiritual well that is the Orthodox understanding of creation, fall, repentance, the passions and theosis.
Buying it is all too obscure at this point, but it is worth finding and reading.