Bruce Albertson book

It seems to me to be the same as 1 e4 e5 2 d4 exd4 3 Qxd4 Nc6. Was it perhaps like this?
1. e4 e5
2. d4 ….
[Comment on 2 d4.]
2. … exd4
3. Qxd4 ….
[Comment on 3 Qxd4.]
3. … Nc6
If so, "...." is just a signal that there is to be a comment before going on to Black's move. "3. … Nc6" is a standard way of indicating that Nc6 was Black's 3rd move.