There is also the "little black book", The Divine Liturgy Explained
, compiled by Rev. Nicholas Elias, first published in 1966, and still in print. There is also The Law of God/Zakon' Bozhiy
, available in English and Russian-language versions, which not only covers Liturgy, but many other areas of Orthodoxy as well. The site www.fatheralexander.org
is also a goldmine of information.