Reddit mentions of The Life in Christ (English and Ancient Greek Edition)

That book is a classic. It's old, and some of the translations show that age, but it's still one of the most comprehensive liturgical books available in English.

In addition to a liturgical book like that one, you might want to get a commentary that explains what everything going on liturgically means. I would recommend Nicholas Cabasilas' The Life in Christ, his Commentary on the Divine Liturgy, and Hieromonk Gregorios of Koutloumousiou's The Divine Liturgy: A Commentary in the Light of the Fathers.

Here's the episode in a nutshell, with corresponding footnotes for further exploration:

1. We are called at to union with each other and God (ex: John 17:20-211).
   
   
2. Yet we are confronted with the basic divisions between people, among humans and the rest of creation, and between God and His creation (see here for a brief summary of St. Maximus the Confessor's Ambiguum 41).
   
   
3. We are also confronted with our own internal divisions, which are addressed by, for instance, the Orthodox ascetic tradition and hesychastic prayer -- eliminating distractions, descending the mind into the heart, etc. (see here for instance).
   
   
4. God invites us to overcome these divisions, and achieve true union, through forgiveness.
   
   
5. In Greek, the word used for "forgiveness" is "συγχώρησις" which literally means "occupying the same place or space." This is the union that overcomes the divisions in 2 and 3 above.
   
   
6. The act of creation is itself an invitation to share existence with God, and continues with God's sanctification of creation (seen in, for instance, the themes of "procession and return" in the writing of St. Dionysios the Areopagite).
   
   
7. This is the mystery of Holy Communion, the greatest example of God's forgiveness, whereby we are invited to share in Christ's Body and Blood in a way that surpasses other examples of intimacy and union (articulated very nicely in St. Nicholas Cabasilas' "The Life in Christ").
   
   
8. It's all summarized in Abba Dorotheos's metaphor of the wheel: in drawing closer to God we draw closer to each other, and vice versa. God invites us to the center of the wheel, to share the same space with Him.