For those interested in the scientific research side of dreaming, and a fairly technical one, I ran across this very interesting study that you might like: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2814941/ It goes into great detail about our brain's response during sleep, and it covers dreaming both in REM and NREM phases, contradicting some earlier studies that push heavily on REM dreaming only.