Now the Powers of Heaven is for the Byzantine Christian faithful who desire a fruitful observance of the Great Fast of Lent. Here we learn of the importance of the Presanctified Divine Liturgy within the context of the background of and our journey through the Great Fast and our Christian journey through life. The author, Archpriest David M. Petras is one of the foremost liturgiologists of our time. I offer a blessing to those who take up this book with a sincere desire to “draw near with faith and love” and to dwell among the “partakers of life everlasting.” +Robert M. Pipta Eparchial Bishop of Parma