If you liked the second session on the Joseph Smith Conference, you might like this show – BBC – Radio 4 In Our Time – Angels. Particularlly the beginning. Some interesting comments on how Ancient Israel changed it’s views on gods, angels, etc. before versus after Babylon. For instance – prior to Babylon, Angels were often considered simply mortal men with messages from the Lord and you didn’t know they were Angels until they had delivered their message. I.e., they were recognized as angels by their message. Helps the stories of Abraham and Lot’ts interactions with Angels make much more sense.