[...] This "Prayer Book" does not intend to replace any sequence of our Orthodox Worship tradition, which essentially is the work of the Holy Spirit. Its purpose is to live and delve into the treasury of each individual, in the hidden and heartfelt prayer that emanates from every devout Christian. To provide a handle and opportunity, a place and manner, for more prayer and thus contribute to the connection of man with Jesus Christ, of earth with Heaven, of the ephemeral with eternity. This work is quite incomplete. It does not even include half of the real needs of modern man.
[...]
(from the book's preface)