We get ‘back to God’, as it were, in Chapter 15. Most of this chapter is a conversation between God and Abram, though it’s definitely more one-sided: the first sentence of this chapter describes how the “word of the LORD came to Abram in a vision” (1). While the disembodied voice isn’t new, this is the first time I can remember that the word “vision” being used to describe encounters with God. Case in point: there’s none of this with Adam and Eve — God just starts talking to them.
Depending on your previous beliefs, the explanation for this could range from “merely a translation issue” to “proof that religion is just people on drugs making stuff up.” Either way, the nature of this visitation shows that God seems increasingly mystical and abstract, as if he’s distancing himself from this own creation. Perhaps he’s discovering he can be more effective as a ‘mysterious power’ than a human-like entity, like when he caused those plagues in Egypt.