Reddit mentions of One God, One Lord: Early Christian Devotion and Ancient Jewish Monotheism

The Making of Christianity is focused on the biblical materials and only touches on the second century. Of the three volumes (Gospels, the book of Acts and the rest of the NT) the second may have some liturgical comments in passing, but I do not think it is what you are looking for.

You might consult Larry Hurtado, At the Origins of Christian Worship: The Context and Character of Earliest Christian Devotion or his One God, One Lord: Early Christian Devotion and Ancient Jewish Monotheism.

Yours as well as ChiefPrinceOfNigeria's comments are not grounded in current scholarship.

See for example:

• The Gospel of the Memra: Jewish Binitarianism and the Prologue to John
  
• Alan F. Segal, Two Powers in Heaven: Early Rabbinic Reports about Christianity and Gnosticism (reprint, Waco, TX: Baylor University Press, 2012)
  
• One God, One Lord: Early Christian Devotion and Ancient Jewish Monotheism